Oops, it doesn't look like 'drink served at any time of the day' is a national day..

Other days

boyfriend

Boyfriend Day
lash

Lash Day
first love

First Love Day
stress awareness

Stress Awareness Day
hiv awareness

Hiv Awareness Day
emoji

Emoji Day
blanket fort

Blanket Fort Day
special education

Special Education Day
self appreciation

Self Appreciation Day
cuddle up

Cuddle Up Day