While you need to let server schedule something you can use built-in conn jobs to complete this requirement easily. Below just a sample cron jobs format explanation.
syntax:
minute hour day_of_month month weekday command
| minute | 0 through 59 |
| hour | 0 through 23 |
| day_of_month | 1 through 31 |
| month | 1 through 12 |
| weekday | 0 through 6 for Sunday through Saturday |
| command | a shell command |
sample:
30 * * * * do_every_half_an_hour.sh
* 1 * * * do_at_1am_daily.sh
* * 1 * * do_at_first_day_of_each_month.sh
* * * 1 * do_at_every_jan.sh
* * * * 0 do_at_every_sunday.sh