I need to run cron jobs during the following times:
1st job: 1PM 4PM 7PM etc..
2nd job: 1:15PM 4:15PM 7:15PM etc..
3nd job: 1:30PM 4:30PM 7:30PM etc..
As you can see each job run every 3 hours but each job needs to have 15 minutes "break time" before running to next job.