CCronExplain
Get CronExplain

CronExplain · cron recipes

Cron expression for every 3 hours

The cron expression for every 3 hours is 0 */3 * * *.

In plain English: at minute 0 of hours 0,3,6,9,12,15,18,21.

Field by field

FieldValueMeans
minute00
hour*/30, 3, 6, 9, 12, 15, 18, 21
day*every day of the month
month*every month
weekday*every day of the week, weekends included

Times it fires

Server local time, on every day the schedule matches.

00:00 · 03:00 · 06:00 · 09:00 · 12:00 · 15:00 · 18:00 · 21:00

Check your own expression

Paste any cron line and see what it means, the next ten times it fires, and the same breakdown in your timezone.

Open CronExplain

Other schedules