Cron syntax reference
A standard cron expression has five space-separated fields, in order: minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-6, where 0 is Sunday).
*— any value.5— an exact value.1-5— an inclusive range.1,3,5— a list of values.*/15— every 15 units, starting from the field's minimum.
Day-of-month and day-of-week together
If both the day-of-month and day-of-week fields are restricted (not *), standard cron matches a date if it satisfies either one — not both. For example 0 0 1 * 1 runs both on the 1st of every month and every Monday.
FAQ
Does this run in a specific timezone?
Next-run times are computed against your browser's local time, same as most cron daemons use the system's configured timezone.