Yaksmas

Yaksmas is a holiday celebrated by the people of Ustinkistan. When Timmy Turner's grandparents, Grandma Gladys and Grandpa Vlad came to visit them for Yaksgiving they slapped them with a herring Timmy questioned why they said it was a Yaksgiving custom they mentioned when its Yaksmas instead of a herring its a mackerel.

Information
No information is about them but it was mentioned in Timmy Turnip. They mentioned that they slap people with a mackerel (like Yaksgiving they slap people herring)