diff --git a/.github/workflows/periodic_update.yml b/.github/workflows/periodic_update.yml
index cbca05a8bb1..610f22aaefd 100644
--- a/.github/workflows/periodic_update.yml
+++ b/.github/workflows/periodic_update.yml
@@ -5,10 +5,15 @@ name: Periodic update
 # or API, or on a schedule.
 on:
   workflow_dispatch:
+    inputs:
+      update_po:
+        type: boolean
+        default: false
+        description: If true, also update .po files.
   schedule:
-    # At 10:32 on every first Wednesday of the month.
-    # See https://crontab.guru/#32_10_*/100,1-7_*_WED
-    - cron: "32 10 */100,1-7 * WED"
+    # At 15:32 (UTC) on Saturday.
+    # See https://crontab.guru/#32_15_*_*_SAT
+    - cron: "32 15 * * SAT"
 
 permissions: {}
 
@@ -89,7 +94,9 @@ jobs:
         run: make -j$(nproc)
       - name: Create .pot files (containing original messages)
         run: cd locale && make pot
-      - name: Merge new messages
+      - name: Merge new messages (Done by Weblate plugin)
+        # Default false, but will be true if manually chosen. See https://stackoverflow.com/a/73495922
+        if: ${{ inputs.update_po || false }}
         run: cd locale && make update-po
       - name: Verify the .po files
         run: cd locale && make verify