Happy Valentines Day?

I was just wondering whether there should be an apostrophe after theValentine or should I treat it as a plural as in just 'valentines!' In any case, I guess I would rather wish St Valentine rather than valentines, considering my present status! Maybe he will bless me :)

Happy Valentine's Day.
Love,

D


Here's a random quote that I used as an email signature years ago.

"Don't be sad because it's over.
Smile because it happened."