Power Platform Community Forum Thread Details

I am currently working on creating a flow that has to run on the 21st of each month. However, just to test it I tried setting the time and date to be a month earlier (it is currently 10th Nov, so I set it to 10th Oct). I then waited for the time I set the flow to start at and then nothing happened. But if I change the month to Nov the trigger activates.

Could anyone provide any insight as to why the trigger didn't activate ? I want to make sure the trigger will activate each month.

Screenshot below: