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Is there a way to schedule an apex class(schedulable of course) to run every second week?

I thought I could do it in the UI by scheduling 2 jobs for 2nd and 4rd Friday of the month, but the moment I try to schedule the second one I get the error:

Error: This Apex class is already scheduled for execution.

I have seen this answer, but that doesn't really fit my needs. My batch should only start executing every second Friday after work hours.

I was also thinking about using cron, but couldn't find a way to schedule it for every second and fourth Friday of the month.

  • what about this cron: 0 1 8-14,21-28 * 5 – kurunve Nov 7 '17 at 7:06
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Here are the cron expressions for the schedule.

Every 2nd Friday of a Month at 8 PM

0 0 20 ? 1/1 FRI#2 *

Every 4th Friday of a Month at 8 PM

0 0 20 ? 1/1 FRI#4 *

The code to run in developer console anonymous block to schedule the jobs

System.schedule('2nd Friday Schedule', '0 0 20 ? 1/1 FRI#2 *', new YourApexClass());
System.schedule('4th Friday Schedule', '0 0 20 ? 1/1 FRI#4 *', new YourApexClass());
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