Every 3 Hours Cron Expression
Runs eight times per day at 00:00, 03:00, 06:00, …
Expression
0 */3 * * *Try it in the tester →Field Breakdown
0
minute
*/3
hour
*
day-of-month
*
month
*
day-of-week
minuteat minute 0
hourevery 3 hours, starting at 0
day-of-monthevery day (1–31)
monthevery month (1–12)
day-of-weekevery weekday (0=Sun – 6=Sat)
How It Works
Minute pinned to 0, hour uses `*/3` — fires at 0, 3, 6, 9, 12, 15, 18, 21 hours of every day.
Example Run Times
- 00:00:00
- 03:00:00
- 06:00:00
- 09:00:00
- 12:00:00
Frequently Asked Questions
Is `0 0,3,6,9,12,15,18,21 * * *` equivalent?
Yes — same eight fire points, written explicitly.