Nested IF statements between dates

Hello! I’m trying to create a nested IF statement that uses a date field about an event {End Date}, to determine which quarter the event was in but I keep getting invalid formula errors. I am pretty well versed in excel formulas, but my knowledge does not seem to transfer to Airtable. Unfortunately, the quarters are weird and run Q1: 8/15-11/14, Q2: 11/15-2/14, Q3: 2/15-5/14, and Q4: 5/15-8/14. Ideally I would like this formula to continue to work for upcoming years without revision. Any ideas are much appreciated!