Oops, it doesn't look like 'Team In Havana day' is a national day..

Other days

ruby

Ruby Day
frozen yogurt

Frozen Yogurt Day
boba

Boba Day
youth

Youth Day
lash

Lash Day
cursing

Cursing Day
self care

Self Care Day
prosecco

Prosecco Day
nae nae

Nae Nae Day
offer

Offer Day