diff --git a/.github/workflows/ccpp.yml b/.github/workflows/ccpp.yml
index 9dc80b2..dc121b5 100644
--- a/.github/workflows/ccpp.yml
+++ b/.github/workflows/ccpp.yml
@@ -1,6 +1,10 @@
 name: linux
 
-on: [push]
+on: 
+  push:
+  pull_request: 
+  schedule: 
+    - cron: '0 0 1 * *'
 
 jobs:
   build:
diff --git a/.github/workflows/win32.yml b/.github/workflows/win32.yml
index 94b09ae..dd673c8 100644
--- a/.github/workflows/win32.yml
+++ b/.github/workflows/win32.yml
@@ -1,6 +1,10 @@
 name: epanet2-win32
 
-on: [push]
+on: 
+  push:
+  pull_request: 
+  schedule: 
+    - cron: '0 0 1 * *'
 
 jobs:
   build:
diff --git a/.github/workflows/win64.yml b/.github/workflows/win64.yml
index c6802ae..560a4a3 100644
--- a/.github/workflows/win64.yml
+++ b/.github/workflows/win64.yml
@@ -1,6 +1,10 @@
 name: epanet2-win64
 
-on: [push]
+on: 
+  push:
+  pull_request: 
+  schedule: 
+    - cron: '0 0 1 * *'
 
 jobs:
   build: