diff --git a/sharness/__snapshots__/example-github-load/data/sourcecred/example-github/github/view.json.gz b/sharness/__snapshots__/example-github-load/data/sourcecred/example-github/github/view.json.gz
index d7f9bea..3075944 100644
Binary files a/sharness/__snapshots__/example-github-load/data/sourcecred/example-github/github/view.json.gz and b/sharness/__snapshots__/example-github-load/data/sourcecred/example-github/github/view.json.gz differ
diff --git a/src/plugins/github/__snapshots__/relationalView.test.js.snap b/src/plugins/github/__snapshots__/relationalView.test.js.snap
index 1dbc112..262b859 100644
--- a/src/plugins/github/__snapshots__/relationalView.test.js.snap
+++ b/src/plugins/github/__snapshots__/relationalView.test.js.snap
@@ -10,6 +10,8 @@ Array [
 
 exports[`plugins/github/relationalView Comment has body 1`] = `"seems a bit capricious"`;
 
+exports[`plugins/github/relationalView Comment has createdAt 1`] = `1519878210000`;
+
 exports[`plugins/github/relationalView Comment has parent 1`] = `
 Object {
   "url": "https://github.com/sourcecred/example-github/pull/5#pullrequestreview-100313899",
@@ -160,6 +162,8 @@ Array [
 
 exports[`plugins/github/relationalView Issue has body 1`] = `"This issue references another issue, namely #1"`;
 
+exports[`plugins/github/relationalView Issue has createdAt 1`] = `1519807129000`;
+
 exports[`plugins/github/relationalView Issue has number 1`] = `"2"`;
 
 exports[`plugins/github/relationalView Issue has parent 1`] = `
@@ -200,6 +204,8 @@ exports[`plugins/github/relationalView Pull has body 1`] = `
 - then approve the pr"
 `;
 
+exports[`plugins/github/relationalView Pull has createdAt 1`] = `1519807636000`;
+
 exports[`plugins/github/relationalView Pull has deletions 1`] = `0`;
 
 exports[`plugins/github/relationalView Pull has mergedAs 1`] = `
@@ -325,6 +331,8 @@ Array [
 ]
 `;
 
+exports[`plugins/github/relationalView Repo has createdAt 1`] = `1519807034000`;
+
 exports[`plugins/github/relationalView Repo has name 1`] = `"example-github"`;
 
 exports[`plugins/github/relationalView Repo has owner 1`] = `"sourcecred"`;
@@ -376,6 +384,8 @@ Array [
 
 exports[`plugins/github/relationalView Review has body 1`] = `"hmmm.jpg"`;
 
+exports[`plugins/github/relationalView Review has createdAt 1`] = `1519878210000`;
+
 exports[`plugins/github/relationalView Review has parent 1`] = `
 Object {
   "url": "https://github.com/sourcecred/example-github/pull/5",
diff --git a/src/plugins/github/example/example-github.json b/src/plugins/github/example/example-github.json
index 8201bc6..4c53a2f 100644
--- a/src/plugins/github/example/example-github.json
+++ b/src/plugins/github/example/example-github.json
@@ -1,5 +1,6 @@
 {
     "__typename": "Repository",
+    "createdAt": "2018-02-28T08:37:14Z",
     "defaultBranchRef": {
         "__typename": "Ref",
         "id": "MDM6UmVmMTIzMjU1MDA2Om1hc3Rlcg==",
@@ -138,6 +139,7 @@
             "body": "This is just an example issue.",
             "comments": [
             ],
+            "createdAt": "2018-02-28T08:38:08Z",
             "id": "MDU6SXNzdWUzMDA5MzQ4MTg=",
             "number": 1,
             "reactions": [
@@ -186,6 +188,7 @@
                         "url": "https://github.com/decentralion"
                     },
                     "body": "It should also be possible to reference by exact url: https://github.com/sourcecred/example-github/issues/6",
+                    "createdAt": "2018-03-16T16:28:13Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDM3Mzc2ODcwMw==",
                     "reactions": [
                     ],
@@ -200,6 +203,7 @@
                         "url": "https://github.com/decentralion"
                     },
                     "body": "We might also reference individual comments directly.\r\nhttps://github.com/sourcecred/example-github/issues/6#issuecomment-373768538",
+                    "createdAt": "2018-03-16T16:28:45Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDM3Mzc2ODg1MA==",
                     "reactions": [
                     ],
@@ -214,6 +218,7 @@
                         "url": "https://github.com/decentralion"
                     },
                     "body": "Here's a PR by direct url: https://github.com/sourcecred/example-github/pull/5",
+                    "createdAt": "2018-05-01T01:25:09Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDM4NTU3NjE4NQ==",
                     "reactions": [
                     ],
@@ -228,6 +233,7 @@
                         "url": "https://github.com/decentralion"
                     },
                     "body": "a PR review by url: https://github.com/sourcecred/example-github/pull/5#pullrequestreview-100313899",
+                    "createdAt": "2018-05-01T01:25:25Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDM4NTU3NjIyMA==",
                     "reactions": [
                     ],
@@ -242,6 +248,7 @@
                         "url": "https://github.com/decentralion"
                     },
                     "body": "a PR Review Comment by url: https://github.com/sourcecred/example-github/pull/5#discussion_r171460198",
+                    "createdAt": "2018-05-01T01:25:39Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDM4NTU3NjI0OA==",
                     "reactions": [
                     ],
@@ -256,6 +263,7 @@
                         "url": "https://github.com/decentralion"
                     },
                     "body": "a user by url: https://github.com/wchargin",
+                    "createdAt": "2018-05-01T01:25:51Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDM4NTU3NjI3Mw==",
                     "reactions": [
                     ],
@@ -270,6 +278,7 @@
                         "url": "https://github.com/decentralion"
                     },
                     "body": "Here are several references:\r\n#1 \r\n#2\r\n#3 \r\n\r\nhttps://github.com/sourcecred/example-github/pull/5#discussion_r171460198\r\nhttps://github.com/sourcecred/example-github/pull/5#pullrequestreview-100313899\r\n",
+                    "createdAt": "2018-05-01T01:30:31Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDM4NTU3NjkyMA==",
                     "reactions": [
                     ],
@@ -284,12 +293,14 @@
                         "url": "https://github.com/decentralion"
                     },
                     "body": "This comment has no references.",
+                    "createdAt": "2018-05-01T01:30:38Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDM4NTU3NjkzNg==",
                     "reactions": [
                     ],
                     "url": "https://github.com/sourcecred/example-github/issues/2#issuecomment-385576936"
                 }
             ],
+            "createdAt": "2018-02-28T08:38:49Z",
             "id": "MDU6SXNzdWUzMDA5MzQ5ODA=",
             "number": 2,
             "reactions": [
@@ -308,6 +319,7 @@
             "body": "Alas, its life as an open issue had only just begun.",
             "comments": [
             ],
+            "createdAt": "2018-02-28T08:44:14Z",
             "id": "MDU6SXNzdWUzMDA5MzYzNzQ=",
             "number": 4,
             "reactions": [
@@ -334,6 +346,7 @@
                         "url": "https://github.com/decentralion"
                     },
                     "body": "A wild COMMENT appeared!",
+                    "createdAt": "2018-03-16T16:27:22Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDM3Mzc2ODQ0Mg==",
                     "reactions": [
                     ],
@@ -348,6 +361,7 @@
                         "url": "https://github.com/decentralion"
                     },
                     "body": "And the maintainer said, \"Let there be comments!\"",
+                    "createdAt": "2018-03-16T16:27:41Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDM3Mzc2ODUzOA==",
                     "reactions": [
                     ],
@@ -362,6 +376,7 @@
                         "url": "https://github.com/decentralion"
                     },
                     "body": "This comment references an #2, which itself references an issue. This comment is thus allows us to test that in-references are not included when requesting a Post's references.",
+                    "createdAt": "2018-04-29T03:41:47Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDM4NTIyMzMxNg==",
                     "reactions": [
                     ],
@@ -376,12 +391,14 @@
                         "url": "https://github.com/credbot"
                     },
                     "body": "Hi! I'm a bot! Beep boop beep!!",
+                    "createdAt": "2018-08-29T20:59:50Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDQxNzEwNDA0Nw==",
                     "reactions": [
                     ],
                     "url": "https://github.com/sourcecred/example-github/issues/6#issuecomment-417104047"
                 }
             ],
+            "createdAt": "2018-03-16T16:27:04Z",
             "id": "MDU6SXNzdWUzMDU5OTM3NzM=",
             "number": 6,
             "reactions": [
@@ -400,6 +417,7 @@
             "body": "Deal with this, naive string display algorithms!!!!!",
             "comments": [
             ],
+            "createdAt": "2018-03-20T18:19:09Z",
             "id": "MDU6SXNzdWUzMDY5ODM1NTI=",
             "number": 7,
             "reactions": [
@@ -418,6 +436,7 @@
             "body": "Issue with Unicode: ȴሲ𣐳楢👍 :heart: 𐤔𐤁𐤀𐤑𐤍𐤉𐤔𐤌𐤄𐤍𐤍 ❤️\r\nIssue with Unicode: ȴሲ𣐳楢👍 :heart: 𐤔𐤁𐤀𐤑𐤍𐤉𐤔𐤌𐤄𐤍𐤍 ❤️",
             "comments": [
             ],
+            "createdAt": "2018-03-20T18:24:03Z",
             "id": "MDU6SXNzdWUzMDY5ODUzNjc=",
             "number": 8,
             "reactions": [
@@ -436,6 +455,7 @@
             "body": "This issue was paired with @wchargin \r\n\r\nIt also attempts to reference itself: #10\r\n\r\nIt also references something twice: #2 #2 ",
             "comments": [
             ],
+            "createdAt": "2018-06-29T18:30:21Z",
             "id": "MDU6SXNzdWUzMzcwOTU0NzM=",
             "number": 10,
             "reactions": [
@@ -457,6 +477,7 @@
                     "__typename": "IssueComment",
                     "author": null,
                     "body": "Hello. :ghost: ",
+                    "createdAt": "2018-09-12T21:59:05Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDQyMDgxMTg3Mg==",
                     "reactions": [
                     ],
@@ -471,6 +492,7 @@
                         "url": "https://github.com/wchargin"
                     },
                     "body": "[Here is a screenshot of the thread at this point, prior to account deletion.](https://user-images.githubusercontent.com/4317806/45455614-8c4fe600-b69c-11e8-902e-aec65d7403e6.png)\r\n\r\nThe user has GraphQL ID `MDQ6VXNlcjQzMjIyMTkw` and database ID `43222190`.\r\n\r\nThe previous comment has GraphQL ID `MDEyOklzc3VlQ29tbWVudDQyMDgxMTg3Mg==` and database `420811872`.\r\n",
+                    "createdAt": "2018-09-12T22:03:33Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDQyMDgxMzAxMw==",
                     "reactions": [
                     ],
@@ -480,6 +502,7 @@
                     "__typename": "IssueComment",
                     "author": null,
                     "body": "My time in this life draws to a close. :wave: ",
+                    "createdAt": "2018-09-12T22:04:18Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDQyMDgxMzIwNg==",
                     "reactions": [
                         {
@@ -538,12 +561,14 @@
                         "url": "https://github.com/decentralion"
                     },
                     "body": ":skull: :ghost:\r\nRIP",
+                    "createdAt": "2018-09-12T22:06:05Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDQyMDgxMzYyMQ==",
                     "reactions": [
                     ],
                     "url": "https://github.com/sourcecred/example-github/issues/11#issuecomment-420813621"
                 }
             ],
+            "createdAt": "2018-09-12T21:57:59Z",
             "id": "MDU6SXNzdWUzNTk2Njc4Mjk=",
             "number": 11,
             "reactions": [
@@ -562,6 +587,7 @@
             "body": "By url: https://github.com/sourcecred/example-github/commit/ec91adb718a6045b492303f00d8e8beb957dc780\r\n\r\nBy hash: ecc889dc94cf6da17ae6eab5bb7b7155f577519d\r\n\r\nHash from another repo: 3715ddfb8d4c4fd2a6f6af75488c82f84c92ec2f (example-git in this case)",
             "comments": [
             ],
+            "createdAt": "2018-09-13T22:34:46Z",
             "id": "MDU6SXNzdWUzNjAwOTExMDc=",
             "number": 12,
             "reactions": [
@@ -591,6 +617,7 @@
             "body": "I'm reacting to this with every emoji.",
             "comments": [
             ],
+            "createdAt": "2018-09-13T22:35:37Z",
             "id": "MDU6SXNzdWUzNjAwOTEzMTQ=",
             "number": 13,
             "reactions": [
@@ -715,12 +742,14 @@
                         "url": "https://github.com/decentralion"
                     },
                     "body": "It seems apropos to reference something from a pull request comment... eg: #2 ",
+                    "createdAt": "2018-02-28T08:43:40Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDM2OTE2MjIyMg==",
                     "reactions": [
                     ],
                     "url": "https://github.com/sourcecred/example-github/pull/3#issuecomment-369162222"
                 }
             ],
+            "createdAt": "2018-02-28T08:43:19Z",
             "deletions": 0,
             "id": "MDExOlB1bGxSZXF1ZXN0MTcxODg3NzQx",
             "mergeCommit": {
@@ -823,6 +852,7 @@
                         "url": "https://github.com/wchargin"
                     },
                     "body": "In retrospect, this was an excellent PR.",
+                    "createdAt": "2018-06-12T00:46:20Z",
                     "id": "MDEyOklzc3VlQ29tbWVudDM5NjQzMDQ2NA==",
                     "reactions": [
                         {
@@ -851,6 +881,7 @@
                     "url": "https://github.com/sourcecred/example-github/pull/5#issuecomment-396430464"
                 }
             ],
+            "createdAt": "2018-02-28T08:47:16Z",
             "deletions": 0,
             "id": "MDExOlB1bGxSZXF1ZXN0MTcxODg4NTIy",
             "mergeCommit": {
@@ -966,6 +997,7 @@
                                 "url": "https://github.com/wchargin"
                             },
                             "body": "seems a bit capricious",
+                            "createdAt": "2018-03-01T04:23:30Z",
                             "id": "MDI0OlB1bGxSZXF1ZXN0UmV2aWV3Q29tbWVudDE3MTQ2MDE5OA==",
                             "reactions": [
                                 {
@@ -1104,6 +1136,7 @@
                             "url": "https://github.com/sourcecred/example-github/pull/5#discussion_r171460198"
                         }
                     ],
+                    "createdAt": "2018-03-01T04:23:30Z",
                     "id": "MDE3OlB1bGxSZXF1ZXN0UmV2aWV3MTAwMzEzODk5",
                     "state": "CHANGES_REQUESTED",
                     "url": "https://github.com/sourcecred/example-github/pull/5#pullrequestreview-100313899"
@@ -1119,6 +1152,7 @@
                     "body": "I'm sold",
                     "comments": [
                     ],
+                    "createdAt": "2018-03-01T04:24:56Z",
                     "id": "MDE3OlB1bGxSZXF1ZXN0UmV2aWV3MTAwMzE0MDM4",
                     "state": "APPROVED",
                     "url": "https://github.com/sourcecred/example-github/pull/5#pullrequestreview-100314038"
@@ -1139,6 +1173,7 @@
             "body": "Nominally paired with @wchargin",
             "comments": [
             ],
+            "createdAt": "2018-05-03T18:53:15Z",
             "deletions": 0,
             "id": "MDExOlB1bGxSZXF1ZXN0MTg1ODA2MTU3",
             "mergeCommit": null,
diff --git a/src/plugins/github/graphqlTypes.js b/src/plugins/github/graphqlTypes.js
index 0464732..a52a89f 100644
--- a/src/plugins/github/graphqlTypes.js
+++ b/src/plugins/github/graphqlTypes.js
@@ -45,6 +45,7 @@ export type Issue = {|
   +author: null | Actor,
   +body: String,
   +comments: $ReadOnlyArray<null | IssueComment>,
+  +createdAt: DateTime,
   +id: string,
   +number: Int,
   +reactions: $ReadOnlyArray<null | Reaction>,
@@ -56,6 +57,7 @@ export type IssueComment = {|
   +__typename: "IssueComment",
   +author: null | Actor,
   +body: String,
+  +createdAt: DateTime,
   +id: string,
   +reactions: $ReadOnlyArray<null | Reaction>,
   +url: URI,
@@ -74,6 +76,7 @@ export type PullRequest = {|
   +author: null | Actor,
   +body: String,
   +comments: $ReadOnlyArray<null | IssueComment>,
+  +createdAt: DateTime,
   +deletions: Int,
   +id: string,
   +mergeCommit: null | Commit,
@@ -89,6 +92,7 @@ export type PullRequestReview = {|
   +author: null | Actor,
   +body: String,
   +comments: $ReadOnlyArray<null | PullRequestReviewComment>,
+  +createdAt: DateTime,
   +id: string,
   +state: PullRequestReviewState,
   +url: URI,
@@ -98,6 +102,7 @@ export type PullRequestReviewComment = {|
   +__typename: "PullRequestReviewComment",
   +author: null | Actor,
   +body: String,
+  +createdAt: DateTime,
   +id: string,
   +reactions: $ReadOnlyArray<null | Reaction>,
   +url: URI,
@@ -169,6 +174,7 @@ export type Ref = {|
 
 export type Repository = {|
   +__typename: "Repository",
+  +createdAt: DateTime,
   +defaultBranchRef: null | Ref,
   +id: string,
   +issues: $ReadOnlyArray<null | Issue>,
diff --git a/src/plugins/github/heuristics/mentionsAuthorReference.test.js b/src/plugins/github/heuristics/mentionsAuthorReference.test.js
index 848735e..60c7c46 100644
--- a/src/plugins/github/heuristics/mentionsAuthorReference.test.js
+++ b/src/plugins/github/heuristics/mentionsAuthorReference.test.js
@@ -55,6 +55,7 @@ describe("plugins/github/heuristics/mentionsAuthorReference", () => {
     const repository: Repository = {
       __typename: "Repository",
       id: "repo:my-repo",
+      createdAt: "2019-05-20T22:52:07Z",
       issues: [
         {
           __typename: "Issue",
@@ -66,6 +67,7 @@ describe("plugins/github/heuristics/mentionsAuthorReference", () => {
           author: authors.steven(),
           comments: [],
           reactions: [],
+          createdAt: "2019-05-20T22:52:07Z",
         },
         {
           __typename: "Issue",
@@ -76,6 +78,7 @@ describe("plugins/github/heuristics/mentionsAuthorReference", () => {
           body: "it is me, @steven\n\nPaired with: @pearl",
           author: authors.steven(),
           reactions: [],
+          createdAt: "2019-05-20T22:52:07Z",
           comments: [
             {
               __typename: "IssueComment",
@@ -84,6 +87,7 @@ describe("plugins/github/heuristics/mentionsAuthorReference", () => {
               body: "parry parry thrust @pearl\nparry parry thrust @steven",
               author: authors.holo(),
               reactions: [],
+              createdAt: "2019-05-20T22:52:07Z",
             },
             {
               __typename: "IssueComment",
@@ -92,6 +96,7 @@ describe("plugins/github/heuristics/mentionsAuthorReference", () => {
               body: "@holo-pearl: stop!",
               author: authors.steven(),
               reactions: [],
+              createdAt: "2019-05-20T22:52:07Z",
             },
             {
               __typename: "IssueComment",
@@ -100,6 +105,7 @@ describe("plugins/github/heuristics/mentionsAuthorReference", () => {
               body: "@amethyst @garnet why aren't you helping",
               author: authors.pearl(),
               reactions: [],
+              createdAt: "2019-05-20T22:52:07Z",
             },
             {
               __typename: "IssueComment",
@@ -108,6 +114,7 @@ describe("plugins/github/heuristics/mentionsAuthorReference", () => {
               body: "@amethyst! come quickly, @amethyst!",
               author: authors.garnet(),
               reactions: [],
+              createdAt: "2019-05-20T22:52:07Z",
             },
             {
               __typename: "IssueComment",
@@ -116,6 +123,7 @@ describe("plugins/github/heuristics/mentionsAuthorReference", () => {
               body: "i am busy fighting @boomerang-blade guy",
               author: authors.amethyst(),
               reactions: [],
+              createdAt: "2019-05-20T22:52:07Z",
             },
           ],
         },
@@ -135,6 +143,7 @@ describe("plugins/github/heuristics/mentionsAuthorReference", () => {
           comments: [],
           author: authors.steven(),
           reviews: [],
+          createdAt: "2019-05-20T22:52:07Z",
         },
       ],
       url: "https://github.com/my-owner/my-repo",
diff --git a/src/plugins/github/relationalView.js b/src/plugins/github/relationalView.js
index 40394e5..e552e98 100644
--- a/src/plugins/github/relationalView.js
+++ b/src/plugins/github/relationalView.js
@@ -28,6 +28,8 @@ import {
   reviewCommentUrlToId,
 } from "./urlIdParse";
 
+export type MsSinceEpoch = number;
+
 const COMPAT_INFO = {
   type: "sourcecred/github/relationalView",
   version: "0.2.0",
@@ -298,6 +300,7 @@ export class RelationalView {
       pulls: expectAllNonNull(json, "pullRequests", json.pullRequests).map(
         (x) => this._addPull(address, x)
       ),
+      createdAt: +new Date(json.createdAt),
     };
     const raw = N.toRaw(address);
     this._repos.set(raw, entry);
@@ -339,6 +342,7 @@ export class RelationalView {
       reactions: expectAllNonNull(json, "reactions", json.reactions).map((x) =>
         this._addReaction(x)
       ),
+      createdAt: +new Date(json.createdAt),
     };
     this._issues.set(N.toRaw(address), entry);
     return address;
@@ -421,6 +425,7 @@ export class RelationalView {
       reactions: expectAllNonNull(json, "reactions", json.reactions).map((x) =>
         this._addReaction(x)
       ),
+      createdAt: +new Date(json.createdAt),
     };
     this._pulls.set(N.toRaw(address), entry);
     return address;
@@ -441,6 +446,7 @@ export class RelationalView {
       ),
       body: json.body,
       authors: this._addNullableAuthor(json.author),
+      createdAt: +new Date(json.createdAt),
     };
     this._reviews.set(N.toRaw(address), entry);
     return address;
@@ -473,6 +479,7 @@ export class RelationalView {
       reactions: expectAllNonNull(json, "reactions", json.reactions).map((x) =>
         this._addReaction(x)
       ),
+      createdAt: +new Date(json.createdAt),
     };
     this._comments.set(N.toRaw(address), entry);
     return address;
@@ -719,6 +726,7 @@ type RepoEntry = {|
   +url: string,
   +issues: IssueAddress[],
   +pulls: PullAddress[],
+  +createdAt: MsSinceEpoch,
 |};
 
 export class Repo extends _Entity<RepoEntry> {
@@ -746,6 +754,9 @@ export class Repo extends _Entity<RepoEntry> {
   referencedBy(): Iterator<TextContentEntity> {
     return this._view._referencedBy(this);
   }
+  createdAt(): MsSinceEpoch {
+    return this._entry.createdAt;
+  }
 }
 
 type IssueEntry = {|
@@ -756,6 +767,7 @@ type IssueEntry = {|
   +comments: CommentAddress[],
   +authors: UserlikeAddress[],
   +reactions: ReactionRecord[],
+  +createdAt: MsSinceEpoch,
 |};
 
 export class Issue extends _Entity<IssueEntry> {
@@ -776,6 +788,9 @@ export class Issue extends _Entity<IssueEntry> {
   body(): string {
     return this._entry.body;
   }
+  createdAt(): MsSinceEpoch {
+    return this._entry.createdAt;
+  }
   *comments(): Iterator<Comment> {
     for (const address of this._entry.comments) {
       const comment = this._view.comment(address);
@@ -808,6 +823,7 @@ type PullEntry = {|
   +deletions: number,
   +authors: UserlikeAddress[],
   +reactions: ReactionRecord[],
+  +createdAt: MsSinceEpoch,
 |};
 
 export class Pull extends _Entity<PullEntry> {
@@ -837,6 +853,9 @@ export class Pull extends _Entity<PullEntry> {
   mergedAs(): ?GitNode.CommitAddress {
     return this._entry.mergedAs;
   }
+  createdAt(): MsSinceEpoch {
+    return this._entry.createdAt;
+  }
   *reviews(): Iterator<Review> {
     for (const address of this._entry.reviews) {
       const review = this._view.review(address);
@@ -870,6 +889,7 @@ type ReviewEntry = {|
   +comments: CommentAddress[],
   +state: T.PullRequestReviewState,
   +authors: UserlikeAddress[],
+  +createdAt: MsSinceEpoch,
 |};
 
 export class Review extends _Entity<ReviewEntry> {
@@ -896,6 +916,9 @@ export class Review extends _Entity<ReviewEntry> {
   authors(): Iterator<Userlike> {
     return getAuthors(this._view, this._entry);
   }
+  createdAt(): MsSinceEpoch {
+    return this._entry.createdAt;
+  }
   references(): Iterator<ReferentEntity> {
     return this._view._references(this);
   }
@@ -910,6 +933,7 @@ type CommentEntry = {|
   +url: string,
   +authors: UserlikeAddress[],
   +reactions: ReactionRecord[],
+  +createdAt: MsSinceEpoch,
 |};
 
 export class Comment extends _Entity<CommentEntry> {
@@ -937,6 +961,9 @@ export class Comment extends _Entity<CommentEntry> {
   body(): string {
     return this._entry.body;
   }
+  createdAt(): MsSinceEpoch {
+    return this._entry.createdAt;
+  }
   authors(): Iterator<Userlike> {
     return getAuthors(this._view, this._entry);
   }
diff --git a/src/plugins/github/relationalView.test.js b/src/plugins/github/relationalView.test.js
index 4f6124b..ba07db8 100644
--- a/src/plugins/github/relationalView.test.js
+++ b/src/plugins/github/relationalView.test.js
@@ -83,6 +83,7 @@ describe("plugins/github/relationalView", () => {
     has("owner", () => entity.owner());
     has("name", () => entity.name());
     has("url", () => entity.url());
+    has("createdAt", () => entity.createdAt());
     hasEntities("issues", () => entity.issues());
     hasEntities("pulls", () => entity.pulls());
   });
@@ -95,6 +96,7 @@ describe("plugins/github/relationalView", () => {
     has("title", () => entity.title());
     has("url", () => entity.url());
     has("parent", () => entity.parent());
+    has("createdAt", () => entity.createdAt());
     hasEntities("comments", () => entity.comments());
     hasEntities("authors", () => entity.authors());
     has("reactions", () => entity.reactions());
@@ -115,6 +117,7 @@ describe("plugins/github/relationalView", () => {
     hasEntities("comments", () => entity.comments());
     hasEntities("authors", () => entity.authors());
     has("reactions", () => entity.reactions());
+    has("createdAt", () => entity.createdAt());
   });
 
   const review = Array.from(pull.reviews())[0];
@@ -126,6 +129,7 @@ describe("plugins/github/relationalView", () => {
     has("parent", () => entity.parent());
     hasEntities("comments", () => entity.comments());
     hasEntities("authors", () => entity.authors());
+    has("createdAt", () => entity.createdAt());
   });
 
   const comment = Array.from(review.comments())[0];
@@ -136,6 +140,7 @@ describe("plugins/github/relationalView", () => {
     has("parent", () => entity.parent());
     hasEntities("authors", () => entity.authors());
     has("reactions", () => entity.reactions());
+    has("createdAt", () => entity.createdAt());
   });
 
   const commit = Array.from(view.commits())[0];
diff --git a/src/plugins/github/schema.js b/src/plugins/github/schema.js
index 1606655..384d431 100644
--- a/src/plugins/github/schema.js
+++ b/src/plugins/github/schema.js
@@ -36,6 +36,7 @@ export default function schema(): Schema.Schema {
       issues: s.connection("Issue"),
       pullRequests: s.connection("PullRequest"),
       defaultBranchRef: s.node("Ref"),
+      createdAt: s.primitive(s.nonNull("DateTime")),
     }),
     Issue: s.object({
       id: s.id(),
@@ -46,6 +47,7 @@ export default function schema(): Schema.Schema {
       author: s.node("Actor"),
       comments: s.connection("IssueComment"),
       reactions: s.connection("Reaction"),
+      createdAt: s.primitive(s.nonNull("DateTime")),
     }),
     PullRequest: s.object({
       id: s.id(),
@@ -60,6 +62,7 @@ export default function schema(): Schema.Schema {
       comments: s.connection("IssueComment"), // yes, PRs have IssueComments
       reviews: s.connection("PullRequestReview"),
       reactions: s.connection("Reaction"),
+      createdAt: s.primitive(s.nonNull("DateTime")),
     }),
     IssueComment: s.object({
       id: s.id(),
@@ -67,6 +70,7 @@ export default function schema(): Schema.Schema {
       body: s.primitive(s.nonNull("String")),
       author: s.node("Actor"),
       reactions: s.connection("Reaction"),
+      createdAt: s.primitive(s.nonNull("DateTime")),
     }),
     PullRequestReview: s.object({
       id: s.id(),
@@ -75,6 +79,7 @@ export default function schema(): Schema.Schema {
       author: s.node("Actor"),
       state: s.primitive(s.nonNull("PullRequestReviewState")),
       comments: s.connection("PullRequestReviewComment"),
+      createdAt: s.primitive(s.nonNull("DateTime")),
     }),
     PullRequestReviewComment: s.object({
       id: s.id(),
@@ -82,6 +87,7 @@ export default function schema(): Schema.Schema {
       body: s.primitive(s.nonNull("String")),
       author: s.node("Actor"),
       reactions: s.connection("Reaction"),
+      createdAt: s.primitive(s.nonNull("DateTime")),
     }),
     Reaction: s.object({
       id: s.id(),