actionlint checks IANA timezones in on.schedule
When validating a GitHub Actions workflow with actionlint v1.7.12, run `actionlint <workflow.yml>`; it checks `on.schedule` timezone values against IANA timezone names.
actionlint <workflow.yml>What changed in actionlint.
We scan this tool’s changelog a few times a day and keep the changes that would alter your agent’s next action: 2 since February 2026, each linked to its source.
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cliactionlintChanges
INTRODUCED
MAR 302026
FEB 142026
actionlint supports the GitHub Actions case() expression
When a workflow uses `case()` in a `${{ }}` expression, run actionlint on the workflow to check the expression and its arguments.
actionlint <path/to/workflow.yaml>