crontab -l | explain

Explain a cron expression

// five fields: minute hour day-of-month month day-of-week  ·  names work too (MON-FRI, JAN)  ·  nothing is sent to the server

Next runs

// timezone:

Compare with a second expression

Examples

• * 8 * * 7 — the classic mistake: 60 runs, not one
• 0 8 * * 1 — what that was meant to be
• */15 * * * * — every quarter of an hour
• 0 9-17 * * 1-5 — office hours, on the hour
• 0 0 29 2 * — leap years only
• 0 0 13 * 5 — day-of-month OR day-of-week