Hi, As a starter I would consider adding some kind of numeric QuarterNum field to your app, i.e. 2021 Q2 might be equal to 202102. This is probably going to be helpful no matter the solution
You have said above which quarters you want to display when a single quarter is selected. But what about when the user selects multiple quarters, i.e 2019 Q1 and 2018 Q1? What behaviour do you want in that case?