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

Other days

kale

Kale Day
ruby

Ruby Day
bow tie

Bow Tie Day
china

China Day
bonang

Bonang Day
martini

Martini Day
aloxolt

Aloxolt Day
mean girls

Mean Girls Day
boyfriend

Boyfriend Day
self appreciation

Self Appreciation Day