Cron Expression Generator — illustrative example

INPUT
Run at 09:00 every Monday in a five-field Unix scheduler.

RESULT
0 9 * * 1, using the scheduler's configured timezone; verify daylight-saving behavior in that environment.

REVIEW
Cron syntax depends on the scheduler and timezone. Provide example occurrences and distinguish five-field Unix syntax from formats with seconds.

This is a teaching example, not a live execution record.