Aww..my own special day. Glad you got it !
The stamp is read Top to bottom and right to left. It says Mei Han Gong Fu(kung fu)
In simplified it would look like
功美
夫汉
Mei(美)which means Beautiful/Good/Perfection
Han(汉) which refers to the Han people, which the Chinese people refer to themselves as.
And gong fu should be pretty self-explanatory