Greetings and anniversaries in Polish

Jak masz na imię? = What is your name? (to a child)
Jak się Pan/Pani nazywa? = What is your name? (Sir/Madam)
Nazywam się = My name is
Witam, witamy = (I) welcome/ (we) welcome
Bardzo mi miło = Pleased to meet you
Miło mi pana/panią poznać = Nice to meet you (Sir/Madam)
Jak się masz? = How are you? (only to a child or among friends)
Dobrze = Good
Źle = Bad
Tak sobie/Jako tako = So so
Jak leci? = How it’s going?
Ile masz lat = How old are you?
Ile ma pan/pani lat? = How old are you (Sir/Madam)?
Wszystkiego najlepszego z okazji urodzin! = Happy Birthday!
Gratulacje = Congratulations
Wesołych Świąt = Merry Christmas
Szczęśliwego Nowego Roku = Happy New Year
Sto lat = 100 years! (used to say during birthday celebrations)