Change pre-set holidays and events
As a Canadian, it doesn't make sense to have to deal with every American holiday. It makes more sense to be able to customize the pre-existing ones (for example, I don't care about the US election or American Thanksgiving but we do celebrate Halloween and Valentine's Day)
You can turn off the auto display of all holidays by clicking User Settings > Display Settings > Events & Stickers, and unchecking "Show all Holidays". You can also remove individual auto display holiday stickers by clicking on the action icon for the sticker, and selecting "Delete".
Robert Ali commented
I am looking to adjust the holidays to the calendar where is this located?