diff --git a/.github/workflows/mirror.yml b/.github/workflows/mirror.yml
index bad82d519..1d0907e94 100644
--- a/.github/workflows/mirror.yml
+++ b/.github/workflows/mirror.yml
@@ -37,8 +37,8 @@ jobs:
       - name: Get current date as seconds
         id: get-date
         run: |
-          echo "::set-output name=seconds::$(/bin/date -u'+%s')"
-          echo "::set-output name=timestamp::$(/bin/date -u'+%Y%m%d_%H')"
+          echo "::set-output name=seconds::$(/bin/date -u +'%s')"
+          echo "::set-output name=timestamp::$(/bin/date -u +'%Y%m%d_%H')"
         shell: bash
     
       - name: generate merged authors file