Cron Methodology

A cron expression is a string consisting of five or six fields separated by white space that represents a set of times, normally as a schedule to execute some routine.

Field Meanings

  • Minute: 0-59
  • Hour: 0-23
  • Day of Month: 1-31
  • Month: 1-12 or JAN-DEC
  • Day of Week: 0-6 or SUN-SAT

Use '*' to represent 'every' (e.g., '*' in the minute field means 'every minute').