dax: custom time intelligence

hi,

as an intro, i am doing analysis on flight performance data (specifically on the durations of actual flying, taxi-in, taxi-out, delays etc) for the past few years. in the airline industry, there are northern summer and northern winter seasons where:

a. the northern summer
   begins from the last sunday in march and ends with the last saturday in october each year

b. the northern winter  

   begins from the last sunday in october and ends with the last saturday in march (the following year) each year

flight performance analysis is done between summer periods or winter periods such as the followings

example 1 - summer 2019 vs summer 2020
(summer 2019 is between sunday 31-mar-2019 - saturday 26-october-2019 &
summer 2020 is between sunday 29-mar-2020 - saturday 24-october-2020)

or

example 2 - winter 2019 vs winter 2020.
(winter 2019 is between sunday 27-october-2019 - saturday 28-mar-2020 &
winter 2020 is between sunday 25-october-2020 - saturday 27-mar-2021)

i'd like to create a custom time intelligence using calculation group to analyze flight performance between the corresponding summer or winter seasons (i.e. non-contigous periods). can i get assistance on that pls?

i have attached a sample pbix file for this here. in the master_data table, i hv already created a column to indicate the different seasons in there.

tks & krgds,
-nik