diff --git a/.github/workflows/Regression_Tests.yaml b/.github/workflows/Regression_Tests.yaml
index 3b84de9..2066531 100644
--- a/.github/workflows/Regression_Tests.yaml
+++ b/.github/workflows/Regression_Tests.yaml
@@ -1,15 +1,23 @@
 ---
 name: Regression Tests
 
-on: push
+on:
+  push:                                 # Run when changes pushed to any branch
+  schedule:                             # Run as per cron shedule on default branch (master)
+    - cron:  '13 13 13 3,6,9,12 *'
+
+# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions
+# https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#schedule
+# https://crontab.guru/#13_13_13_3,6,9,12_*
+
 
 jobs:
   Agent:
     strategy:
       matrix:
         platform: [ubuntu-latest, macos-latest, windows-latest]
-        # python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
-        python: ['3.7']
+        python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.x']
+        # python: ['3.7']
       fail-fast: false
     runs-on: ${{ matrix.platform }}
     steps: