Cron scheduler format

The Cron time string is seven values separated by spaces:

Sequence	Character	Values	Note
1	Second	0 to 59	* for all values, ? for no specific value
2	Minute	0 to 59	* for all values, ? for no specific value
3	Hour	0 to 23	* for all values, ? for no specific value
4	Day of Month	1 to 31	* for all values, ? for no specific value
5	Month	1 to 12	* for all values, ? for no specific value
6	Day of Week	0 to 7	* for all values, ? for no specific value
7	Year	-	-

Examples

Cron string	Description
0 15 * * * *	Execute at 15 minutes past the hour, every hour.
0 15 10 * * *	Execute at 10:15 am everyday.
0 0 15 * * MON	Execute at 1:00 p.m on Monday's.
0 */2 * * * *	Execute every two minutes.
0 0 */5 * * *	Execute every five hour, on the hour.
0 0/5 12,16,18 * * ?	Execute every 5 minutes start at 12pm till 12:55pm, repeat same for 16 and 18th hour
0 10 12 01 11 ?	Execute at 12:10 on 01'st of November
0 10 12 ? * 1#2	Execute at 12:10 on the 2nd Monday