Alarm didn’t go off today

I set multiple alarms (6 alarms) every night and today they didn’t go off for some reason. Apparently the same thing happened to my sister, we both have multiple alarms set for 6:30-7am, and hers didn’t go off either.

I went on my alarm app and all alarms were turned off except for one for some reason. I’m certain that I turned on the alarms,.