diff --git a/.github/workflows/CI.yaml b/.github/workflows/CI.yaml
index 2e333f3..69f9698 100644
--- a/.github/workflows/CI.yaml
+++ b/.github/workflows/CI.yaml
@@ -12,11 +12,11 @@ on:
     branches:
       - "master"
       - "main"
-  # schedule:
-    # Nightly tests run on master by default:
-    #   Scheduled workflows run on the latest commit on the default or base branch.
-    #   (from https://help.github.com/en/actions/reference/events-that-trigger-workflows#scheduled-events-schedule)
-    # - cron: "0 0 * * *"
+  schedule:
+  #  Scheduled workflows run on the latest commit on the default or base branch.
+  #  (from https://help.github.com/en/actions/reference/events-that-trigger-workflows#scheduled-events-schedule)
+  # Workflow will run at 8:00 on the first day of the month
+   - cron: "0 8 1 * *"
 
 jobs:
   testCI:
@@ -24,8 +24,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macOS-latest, ubuntu-latest, windows-latest]
-        # os: [macOS-latest, ubuntu-latest]
+        # os: [macOS-latest, ubuntu-latest, windows-latest]
+        os: [macOS-latest, ubuntu-latest]
         python-version: [3.7, 3.9]
 
     steps: