Cron Every 7 Days

The cron expression 0 0 */7 * * runs at midnight on every 7th day of the month — days 1, 8, 15, 22, and 29. This is different from a true weekly schedule because it's based on the calendar date, not the day of the week.

If you want a true weekly schedule (same day every week), use the day-of-week field instead: 0 0 * * 1 for every Monday, 0 0 * * 0 for every Sunday, etc. The day-of-week approach ensures the job always runs on the same weekday regardless of the date.

The day-of-month approach (*/7) is useful when you want date-based periodicity rather than weekday-based — for example, running on the 1st, 8th, 15th, and 22nd regardless of what day of the week they fall on.