Every 3 Hours Cron Expression

Runs eight times per day at 00:00, 03:00, 06:00, …

Expression

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.

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