With the ', or not?

Xniquet blogging live from Ipoh!

Hello people, today I shall refrain myself from blabbering bad words, but instead I'll blog in an extraordinary way that nobody had ever tried before!

As everyone know, today is Valentine's Day. :)

So,

HAPPY VALENTINES DAY.

O_O

Valentine's.

Or,

Valentines.

Notice the different apostrophy. (Did I spell that right?)

As I am too lazy to google, can anyone tell me,

VALENTINE'S, or VALENTINES?

The first sentence on top is just a hoax, I am teh ultimate! XD