diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4e20e30b..1f1dab5e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -2,6 +2,8 @@ name: Build
 
 on:
   workflow_dispatch:
+  schedule:
+    - cron: "0 8 * * 1,4" # midnight US/Pacific on Sundays and Wednesdays
   pull_request:
     branches:
       - main