Dates hierarchy lost

[PP_aPPrentice]

Hi,
I have few visuals where one axis is based on date values. It was working just fine - there was hierarchy and I could filter visual to show data per day/week/month etc. 
Now seems it's all lost and I cannot recreate this hierarchy. 
What happened in the meantime (and what could cause it) is I created date table using formula to be used in one of the report's pages.
I will be thankful for any suggestions on how can I bring it back.

[DataNinja777]

Hi @PP_aPPrentice,

The disappearance of a date hierarchy in your calendar table was caused by setting your calendar table as "Mark as date table".  (I personally prefer no date hierarchy as they take too much real estate in visualizations), but if you want them back, you can set your calendar table as unmark as date table.