Cron Syntax

A reference for the five cron fields and the values each accepts.

A cron expression has five fields: minute, hour, day of month, month, and day of week. Each field accepts a value, a list, a range, or a step.

01The five fields

  • Minute 0-59, hour 0-23.
  • Day of month 1-31, month 1-12.
  • Day of week 0-7, where both 0 and 7 mean Sunday.
  • * means every value; a step such as */5 means every fifth value.

Sources

  1. crontab(5) — Linux manual page — man7.org (accessed 2026-09-01)