Hi @kenyatta67 ,
It seems )maybe I am wrong) that you don’t use you Calendar date dimension for that.
One of the main prerequisite for Time Series function to work is continous date dimension
Melissa made such great explanation in serial of posts about Time intelligence + provide code for continous Date dimension :
If you have more dates /relationships to Calendar dimension you can use USERELATIONSHIP function.
Hope it helps.
Good luck.