linux - Crontab Day of the Week syntax

Question

In crontab does the Day of the Week field run from 0 - 6 or 1 -7?

I am seeing conflicting information on this. wikipedia states 0-6 and other sites I have seen are 1-7.

Also what would be the implication or either using 0 or 7 incorrectly? i.e. would the cron still run?

Answer 1

0 and 7 both stand for Sunday, you can use the one you want, so writing 0-6 or 1-7 has the same result.

Also, as suggested by @Henrik, it is possible to replace numbers by shortened name of days, such as MON, THU, etc:

0 - Sun      Sunday
1 - Mon      Monday
2 - Tue      Tuesday
3 - Wed      Wednesday
4 - Thu      Thursday
5 - Fri      Friday
6 - Sat      Saturday
7 - Sun      Sunday

Graphically, * * * * * command to be executed stands for:

minute	hour	day of month	month	day of week
(0-59)	(0-23)	(1-31)	(1-12)	(1-7)
*	*	*	*	*	command to be executed