Alarms every other week on the same day

My job is having me and another guy work Saturdays and we are alternating those Saturdays is there a way I can set that up in an alarm? And I have ADD and have issues remembering to do things and that is something very very important to remember and I also don’t want to be woken up every Saturday morning at 7:30am when I could be sleeping in. I also don’t want to set up a reminder for the alarm 😑