diff --git a/.forgejo/workflows/build.yml b/.forgejo/workflows/build.yml
index ef81b01..d95bfdb 100644
--- a/.forgejo/workflows/build.yml
+++ b/.forgejo/workflows/build.yml
@@ -10,7 +10,7 @@ jobs:
         run: docker run --rm -w /doc -v $PWD:/doc thomasweise/docker-texlive-full make
       - name: Rename PDFs
         run: |
-          TIMESTAMP=$(date +%Y_%m_%d_%H:%M:%S)
+          TIMESTAMP=$(date +%Y-%m-%dT%H-%M-%S%z)
           BUILT=$(ls examples/resume_jm_tremblay*.pdf)
           cp "$BUILT" "examples/resume_jm_tremblay_${TIMESTAMP}.pdf"
           cp "$BUILT" examples/resume_jm_tremblay_latest.pdf