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

Other days

offer

Offer Day
chocolate milkshake

Chocolate Milkshake Day
fiancee

Fiancee Day
buddy

Buddy Day
ask out your crush

Ask Out Your Crush Day
bow tie

Bow Tie Day
artists

Artists Day
law

Law Day
ruby

Ruby Day
slime

Slime Day