birthday
compleanni
kom-pleh-AN-noh
'Tanti auguri!' (literally 'many wishes') is the standard Italian birthday greeting. It is also used for other occasions. The birthday person typically provides a cake ('offro io' — 'it's on me'), unlike in some other cultures.
Tanti auguri per il tuo compleanno!
Happy birthday to you!
Per il mio compleanno organizziamo una cena in famiglia.
For my birthday we organise a family dinner.