How do you say greetings in Irish Gaelic?

Dia duit - Hello to you. This is the most versatile, standard way of greeting someone.

Dia is mhuire duit - God and Mary to you. This phrase was used more often in the old days and in rural Ireland.

Dia 's Muire dhuit - this is the full Irish version of the greeting above, and would often be shortened to 'Dia 's Muire'.

Conas atá tú? - How are you?

Conas tá tú? - This is a shortened version of the above.