Cron Expression Parser

Cron syntax refresher

A cron expression has five fields: minute, hour, day of month, month, and day of week. Each field accepts exact values (5), ranges (9-17), lists (1,15), steps (*/15) or any (*). Six-field variants with leading seconds are also supported here.

Common gotcha: when both day-of-month and day-of-week are restricted, classic cron runs the job when either matches, not both. Run times shown here use your browser's timezone — a server in another zone will fire at the same wall-clock time in its zone. Cross-check with the timezone converter.