diff --git a/.github/workflows/negative-days-test.yml b/.github/workflows/negative-days-test.yml
new file mode 100644
index 0000000..98ce684
--- /dev/null
+++ b/.github/workflows/negative-days-test.yml
@@ -0,0 +1,26 @@
+name: Test negative days input
+
+on:
+  push:
+    branches:
+      - '**'
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Create branches
+        run: |
+          git checkout -b test-days-1
+          git push -f origin test-days-1
+          git checkout -b test-days-2
+          git push -f origin test-days-2
+          git checkout -b test-days-3
+          git push -f origin test-days-3
+      - name: Test action
+        uses: ./
+        with:
+          days: -1
+          prefix: test-days-
diff --git a/.github/workflows/positive-days-test.yml b/.github/workflows/positive-days-test.yml
new file mode 100644
index 0000000..739dc66
--- /dev/null
+++ b/.github/workflows/positive-days-test.yml
@@ -0,0 +1,31 @@
+name: Test positive days input
+
+on:
+  push:
+    branches:
+      - '**'
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Create branches
+        run: |
+          git checkout -b positive-test-days-1
+          git push -f origin positive-test-days-1
+          git checkout -b positive-test-days-2
+          git push -f origin positive-test-days-2
+          git checkout -b positive-test-days-3
+          git push -f origin positive-test-days-3
+      - name: Test action
+        uses: ./
+        with:
+          days: 10
+          prefix: positive-test-days-
+      - name: Delete branches (clean up)
+        run: |
+          git push -d origin positive-test-days-1
+          git push -d origin positive-test-days-2
+          git push -d origin positive-test-days-3
diff --git a/.github/workflows/prefix-test.yml b/.github/workflows/prefix-test.yml
new file mode 100644
index 0000000..5c0bc63
--- /dev/null
+++ b/.github/workflows/prefix-test.yml
@@ -0,0 +1,25 @@
+name: Test prefix
+
+on:
+  push:
+    branches:
+      - "**"
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Create branches
+        run: |
+          git checkout -b test-prefix-1
+          git push -f origin test-prefix-1
+          git checkout -b test-prefix-2
+          git push -f origin test-prefix-2
+          git checkout -b test-prefix-3
+          git push -f origin test-prefix-3
+      - name: Test action
+        uses: ./
+        with:
+          prefix: test-prefix-
diff --git a/.github/workflows/test.yml b/.github/workflows/suffix-test.yml
similarity index 50%
rename from .github/workflows/test.yml
rename to .github/workflows/suffix-test.yml
index d09483e..ca923fe 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/suffix-test.yml
@@ -1,9 +1,9 @@
-name: Test action
+name: Suffix Test action
 
 on:
   push:
     branches:
-      - master
+      - "**"
 
 jobs:
   main:
@@ -13,13 +13,12 @@ jobs:
         uses: actions/checkout@v2
       - name: Create branches
         run: |
-          git checkout -b prefix-test1-suffix
-          git push -f origin prefix-test1-suffix
-          git checkout -b prefix-test2-suffix
-          git push -f origin prefix-test2-suffix
+          git checkout -b test1-suffix
+          git push -f origin test1-suffix
+          git checkout -b test2-suffix
+          git push -f origin test2-suffix
       - name: Test action
         uses: ./
         with:
           branches: test1,test2
-          prefix: prefix-
-          suffix: -suffix
\ No newline at end of file
+          suffix: -suffix
diff --git a/README.md b/README.md
index 843a43a..39e9f4b 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # Delete multiple branches GitHub Action
 
 An action that deletes multiple branches from repository.
-Optionally one can provide a `prefix` or `suffix` strings that would be appended or prepended to every branch name.
+Optionally one can provide a `suffix` strings that would be appended or prepended to every branch name.
 
 ## Usage
 
@@ -25,4 +25,9 @@ Optionally one can provide a `prefix` or `suffix` strings that would be appended
     github_token: ${{github.token}}
     branches: test
     suffix: -done
+- name: Delete branches older than 10 days
+  uses: dawidd6/action-delete-branch@v3
+  with:
+    github_token: ${{github.token}}
+    days: 10
 ```
diff --git a/action.yml b/action.yml
index c79c8af..11b9c90 100644
--- a/action.yml
+++ b/action.yml
@@ -21,6 +21,12 @@ inputs:
   suffix:
     description: Additional suffix to append to every branch name
     required: false
+  dry_run:
+    description: Runs the action without deleting branhes
+    required: false
+  days:
+    description: Delete branches that are older than the today's date minus number of days
+    required: false
 runs:
   using: node12
   main: main.js
diff --git a/main.js b/main.js
index a01fdd3..9e6e03a 100644
--- a/main.js
+++ b/main.js
@@ -8,11 +8,21 @@ async function main() {
         const branches = core.getInput("branches")
         const prefix = core.getInput("prefix")
         const suffix = core.getInput("suffix")
+        const dryRun = core.getInput("dry_run")
+        const days = core.getInput("days")
 
         const client = github.getOctokit(token)
+        const repoName = github.context.payload.repository.name;
+        const ownerName = github.context.payload.repository.owner.name;
 
         let branchesToDelete = branches ? branches.split(",") : []
-
+        let dateThreshold = new Date();
+        
+        if (days) {
+            dateThreshold.setDate(dateThreshold.getDate() - days);
+            console.log("Branches with commits older than " + dateThreshold.toString() + " will be deleted.");
+        }
+        
         if (numbers) {
             for (const number of numbers.split(",")) {
                 const pull = await client.pulls.get({
@@ -22,18 +32,57 @@ async function main() {
                 branchesToDelete.push(pull.data.head.ref)
             }
         }
-
+        
+        if (prefix) {
+            const branchFunc = await client.paginate("GET /repos/{owner}/{repo}/branches", {
+                owner: ownerName,
+                repo: repoName
+            })
+            .then((branches) => {
+               for (let branch of branches) {
+                   if (branch.name.substring(0, prefix.length) == prefix) {
+                       console.log("Adding branch: " + branch.name + " for deletion.");
+                       branchesToDelete.push(branch.name)
+                   }
+               }
+            });
+        }
+        
+        console.log("Starting the branch deletion...");        
         for (let branch of branchesToDelete) {
-            if (prefix)
-                branch = prefix + branch
+            
             if (suffix)
                 branch = branch + suffix
-            console.log("==> Deleting \"" + branch + "\" branch")
-            await client.git.deleteRef({
-                ...github.context.repo,
-                ref: "heads/" + branch
-            })
+            
+            let canDelete = true;
+            if (days) {
+                await client.request("GET /repos/{owner}/{repo}/branches/{branch}", {
+                    owner: ownerName,
+                    repo: repoName,
+                    branch: branch
+                })
+                .then((ghBranch) => {
+                    let branchLastCommitDate = new Date(ghBranch.data.commit.commit.committer.date);
+                    if (branchLastCommitDate > dateThreshold) {
+                        console.log("Branch \"" + branch + "\" last commit date is " + branchLastCommitDate.toString() + ". It does not meet the threshold and will not be deleted.");
+                        canDelete = false;
+                    }
+                });
+            }
+            
+            if (!canDelete)
+                continue;
+            
+            console.log("==> Deleting \"" + branch + "\" branch");
+
+            if (!dryRun) {
+                await client.git.deleteRef({
+                    ...github.context.repo,
+                    ref: "heads/" + branch
+                })
+            }
         }
+        console.log("Ending the branch deletion...");
     } catch (error) {
         core.setFailed(error.message)
     }