diff --git a/README.md b/README.md
index 8969446..32785ec 100644
--- a/README.md
+++ b/README.md
@@ -113,6 +113,9 @@ Please refer to the [release page](https://github.com/actions/checkout/releases/
     # Default: 1
     fetch-depth: ''
 
+    # Date like `2days` or `1970-01-01`. Fetch a history after the specified time.
+    shallow-since: ''
+
     # Whether to fetch tags, even if fetch-depth > 0.
     # Default: false
     fetch-tags: ''
diff --git a/__test__/git-auth-helper.test.ts b/__test__/git-auth-helper.test.ts
index 7633704..602b4a4 100644
--- a/__test__/git-auth-helper.test.ts
+++ b/__test__/git-auth-helper.test.ts
@@ -808,6 +808,7 @@ async function setup(testName: string): Promise<void> {
     sparseCheckout: [],
     sparseCheckoutConeMode: true,
     fetchDepth: 1,
+    shallowSince: '',
     fetchTags: false,
     showProgress: true,
     lfs: false,
diff --git a/action.yml b/action.yml
index 6842eb8..bbdb1ac 100644
--- a/action.yml
+++ b/action.yml
@@ -74,6 +74,8 @@ inputs:
   fetch-depth:
     description: 'Number of commits to fetch. 0 indicates all history for all branches and tags.'
     default: 1
+  shallow-since:
+    description: 'Date like `2days` or `1970-01-01`. Fetch a history after the specified time.'
   fetch-tags:
     description: 'Whether to fetch tags, even if fetch-depth > 0.'
     default: false
diff --git a/adrs/0153-checkout-v2.md b/adrs/0153-checkout-v2.md
index c331290..d5d3f54 100644
--- a/adrs/0153-checkout-v2.md
+++ b/adrs/0153-checkout-v2.md
@@ -72,6 +72,8 @@ We want to take this opportunity to make behavioral changes, from v1. This docum
   fetch-depth:
     description: 'Number of commits to fetch. 0 indicates all history for all tags and branches.'
     default: 1
+  shallow-since:
+    description: 'Date like `2days` or `1970-01-01`. Fetch a history after the specified time.'
   lfs:
     description: 'Whether to download Git-LFS files'
     default: false
@@ -155,7 +157,7 @@ Fetch only the SHA being built and set depth=1. This significantly reduces the f
 
 If a SHA isn't available (e.g. multi repo), then fetch only the specified ref with depth=1.
 
-The input `fetch-depth` can be used to control the depth.
+The input `fetch-depth` and `shallow-since` can be used to control the depth.
 
 Note:
 - Fetching a single commit is supported by Git wire protocol version 2. The git client uses protocol version 0 by default. The desired protocol version can be overridden in the git config or on the fetch command line invocation (`-c protocol.version=2`). We will override on the fetch command line, for transparency.
diff --git a/dist/index.js b/dist/index.js
index b0db713..f2651f8 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -663,6 +663,9 @@ class GitCommandManager {
             if (options.filter) {
                 args.push(`--filter=${options.filter}`);
             }
+            if (options.shallowSince) {
+                args.push(`--shallow-since=${options.shallowSince}`);
+            }
             if (options.fetchDepth && options.fetchDepth > 0) {
                 args.push(`--depth=${options.fetchDepth}`);
             }
@@ -793,13 +796,16 @@ class GitCommandManager {
             yield this.execGit(args);
         });
     }
-    submoduleUpdate(fetchDepth, recursive) {
+    submoduleUpdate(fetchDepth, recursive, shallowSince) {
         return __awaiter(this, void 0, void 0, function* () {
             const args = ['-c', 'protocol.version=2'];
             args.push('submodule', 'update', '--init', '--force');
             if (fetchDepth > 0) {
                 args.push(`--depth=${fetchDepth}`);
             }
+            if (shallowSince) {
+                args.push(`--shallow-since=${shallowSince}`);
+            }
             if (recursive) {
                 args.push('--recursive');
             }
@@ -1787,6 +1793,12 @@ function getInputs() {
             result.fetchDepth = 0;
         }
         core.debug(`fetch depth = ${result.fetchDepth}`);
+        // Shallow since
+        if (core.getInput('fetch-depth') && core.getInput('shallow-since')) {
+            throw new Error('`fetch-depth` and `shallow-since` cannot be used at the same time');
+        }
+        result.shallowSince = core.getInput('shallow-since');
+        core.debug(`shallow since = ${result.shallowSince}`);
         // Fetch tags
         result.fetchTags =
             (core.getInput('fetch-tags') || 'false').toUpperCase() === 'TRUE';
diff --git a/src/git-command-manager.ts b/src/git-command-manager.ts
index 8e42a38..5c5ec2a 100644
--- a/src/git-command-manager.ts
+++ b/src/git-command-manager.ts
@@ -36,6 +36,7 @@ export interface IGitCommandManager {
     options: {
       filter?: string
       fetchDepth?: number
+      shallowSince?: string
       fetchTags?: boolean
       showProgress?: boolean
     }
@@ -54,8 +55,12 @@ export interface IGitCommandManager {
   shaExists(sha: string): Promise<boolean>
   submoduleForeach(command: string, recursive: boolean): Promise<string>
   submoduleSync(recursive: boolean): Promise<void>
-  submoduleUpdate(fetchDepth: number, recursive: boolean): Promise<void>
   submoduleStatus(): Promise<boolean>
+  submoduleUpdate(
+    fetchDepth: number,
+    recursive: boolean,
+    shallowSince?: string
+  ): Promise<void>
   tagExists(pattern: string): Promise<boolean>
   tryClean(): Promise<boolean>
   tryConfigUnset(configKey: string, globalConfig?: boolean): Promise<boolean>
@@ -256,6 +261,7 @@ class GitCommandManager {
     options: {
       filter?: string
       fetchDepth?: number
+      shallowSince?: string
       fetchTags?: boolean
       showProgress?: boolean
     }
@@ -274,6 +280,10 @@ class GitCommandManager {
       args.push(`--filter=${options.filter}`)
     }
 
+    if (options.shallowSince) {
+      args.push(`--shallow-since=${options.shallowSince}`)
+    }
+
     if (options.fetchDepth && options.fetchDepth > 0) {
       args.push(`--depth=${options.fetchDepth}`)
     } else if (
@@ -409,13 +419,21 @@ class GitCommandManager {
     await this.execGit(args)
   }
 
-  async submoduleUpdate(fetchDepth: number, recursive: boolean): Promise<void> {
+  async submoduleUpdate(
+    fetchDepth: number,
+    recursive: boolean,
+    shallowSince?: string
+  ): Promise<void> {
     const args = ['-c', 'protocol.version=2']
     args.push('submodule', 'update', '--init', '--force')
     if (fetchDepth > 0) {
       args.push(`--depth=${fetchDepth}`)
     }
 
+    if (shallowSince) {
+      args.push(`--shallow-since=${shallowSince}`)
+    }
+
     if (recursive) {
       args.push('--recursive')
     }
diff --git a/src/git-source-settings.ts b/src/git-source-settings.ts
index 4e41ac3..8a2ac0b 100644
--- a/src/git-source-settings.ts
+++ b/src/git-source-settings.ts
@@ -50,7 +50,12 @@ export interface IGitSourceSettings {
   fetchDepth: number
 
   /**
-   * Fetch tags, even if fetchDepth > 0 (default: false)
+   * Deepen or shorten the history of a shallow repository to include all reachable commits after
+   */
+  shallowSince: string
+
+  /**
+   *  Fetch tags, even if fetchDepth > 0 (default: false)
    */
   fetchTags: boolean
 
diff --git a/src/input-helper.ts b/src/input-helper.ts
index 059232f..d33f2ba 100644
--- a/src/input-helper.ts
+++ b/src/input-helper.ts
@@ -108,6 +108,15 @@ export async function getInputs(): Promise<IGitSourceSettings> {
   }
   core.debug(`fetch depth = ${result.fetchDepth}`)
 
+  // Shallow since
+  if (core.getInput('fetch-depth') && core.getInput('shallow-since')) {
+    throw new Error(
+      '`fetch-depth` and `shallow-since` cannot be used at the same time'
+    )
+  }
+  result.shallowSince = core.getInput('shallow-since')
+  core.debug(`shallow since = ${result.shallowSince}`)
+
   // Fetch tags
   result.fetchTags =
     (core.getInput('fetch-tags') || 'false').toUpperCase() === 'TRUE'