Quote from Zoo Manager on 01/31/2021, 11:47 am

There are three type of events in Zoo 2: Animal Park:...

1. Sales events
2. Club events
3. Special events

Listing of events happening in Zoo 2: Animal Park. Select the event you're interested in to access its page!
https://zoo2animalpark.fandom.com/wiki/Zoo_2:_Animal_Park_-_Events#Types_of_Events