It started as happy birthday when you turned 16, because that was when you married. Nowadays, it is just tradition.
Joyeux (or 'bon') seizième anniversaire.
heureux seizième anniversaire
Happy Birthday Sweet 16
Happy Birthday - 1938 was released on: USA: 16 October 1938
With no history of harassment between them before that it is not harassment to say Happy birthday. If you asked her previously to stay away, just get a restraining order.
16 July 1985 Happy to help =) If you are referring to Rhianna the singer, her birthday is February the 20th.
Happy Birthday Michael Mitchell - 2010 was released on: USA: 16 June 2010 (DVD premiere)
Heureux douce seize.
86'd - 2011 Happy Birthday Dong - 2.3 was released on: USA:16 May 2012
Brothers - 1984 Happy Birthday Mel 1-14 was released on: USA: 16 December 1984
J'ai 16 (seize) ans. = I have 16 years. (I am 16.)