Happy Birthday in Modern Standard Arabic is, " Eid milad saeed". In Egypt they say, "Kol sana wa enta/ enty tayeb/ tayeba" it means may you be well or healthy every year. Sana helwa ya gamil is the Arabic version of the Happy Birthday song :)

Happy birthday = Eid melad Saeed here is another congratulation which means (wish you are happy every year) : Kol sana w enta tayeb (to male) Kol sana w ente tayeba (to female)

كل سنه وانت طيب for man كل سنه وانتي طيبه for women

happy birthday : eid milad saeed.

نقول: عيد ميلاد سعيد