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Cron Expression Reference
A cron expression has five fields, separated by spaces. Each field controls a unit of time.
*
*
*
*
*
minute
hour
day of month
month
day of week
| Field | Values | Special Characters |
|---|---|---|
| Minute | 0 – 59 | * / , - |
| Hour | 0 – 23 | * / , - |
| Day of Month | 1 – 31 | * / , - |
| Month | 1 – 12 or JAN – DEC | * / , - |
| Day of Week | 0 – 6 (0 = Sunday) or SUN – SAT | * / , - |
Special Characters
| Character | Meaning | Example |
|---|---|---|
* |
Every value in the field | * * * * * — every minute |
/ |
Step — every Nth value | */15 * * * * — every 15 minutes |
, |
List of specific values | 0 9,17 * * * — 9am and 5pm daily |
- |
Range of values | 0 9 * * 1-5 — 9am, Monday–Friday |
Common Examples
| Expression | Meaning |
|---|---|
* * * * * | Every minute |
*/5 * * * * | Every 5 minutes |
0 * * * * | Every hour on the hour |
0 0 * * * | Every day at midnight |
0 12 * * * | Every day at noon |
0 9 * * 1-5 | 9am every weekday (Mon–Fri) |
0 0 * * 0 | Every Sunday at midnight |
0 0 1 * * | 1st of every month at midnight |
0 0 1 1 * | Once a year — January 1st at midnight |
30 6 * * 1-5 | 6:30am on weekdays |