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

Other days

bow tie

Bow Tie Day
youth

Youth Day
tulip

Tulip Day
lash

Lash Day
self appreciation

Self Appreciation Day
boyfriend

Boyfriend Day
stud

Stud Day
unicorn

Unicorn Day
ruby

Ruby Day
lumpy rug

Lumpy Rug Day