National YoYo day (6/6) is the next one that comes to mind, after that there’s July 4 and then Black Friday; those are the big YYE sales iirc.
Searching for in:title sale @AndreBoulay I found the following sales announcements
2021:
- National YoYo Day
- Fourth of July
- Labor Day
- Halloween
- Black Friday
2020
- National YoYo Day
- Fourth of July
- Halloween
- Black Friday
2019
- National YoYo Day
- Fourth of July
- Halloween
- Black Friday
So I think those four (yo-yo day, 4th, Halloween, Black Friday) are the core sales events of the year for YYE