Let me walk you through creating your first cron job. Run openclaw cron add and the CLI walks you through 4 fields: a human-readable name, a cron schedule expression, a timezone (defaults to your system timezone), and the message to send the agent when the job fires.
Here is an example that runs every weekday at 9 AM:
openclaw cron add \
--name "daily-standup" \
--schedule "0 9 * * 1-5" \
--timezone "America/New_York" \
--message "Summarize yesterday's git commits and open PRs"
Once added, the job appears in openclaw cron list and runs until you remove it with openclaw cron remove daily-standup.