number of months left in the model calendar

Hi,

I'm looking for a way to reference the last month in the model calendar.

For Example My model Calendar is 1 previous year and 2 future years. Currently the last Period is June 2022 however when the model calendar increases i want the formula to reference the new end period.

I then want to count the months from the current period (item(time) to the End period (e.g. June 2022)

Ultimately my goal is to reference the number of months left in the time dimension.