Oops, it doesn't look like 'yoghurt day' is a national day..

Other days

youth

Youth Day
lash

Lash Day
kiss a brunette

Kiss A Brunette Day
bonang

Bonang Day
believe

Believe Day
cuddle up

Cuddle Up Day
offer

Offer Day
tulip

Tulip Day
self care

Self Care Day
lost sock memorial

Lost Sock Memorial Day