Eanáir
An-er
January
Feabhra
Fee-ow-ra
February
Márta
More-ta
March
Aibreán
Ab-rawn
April
Bealtaine
Be-owl-tin-ah
May
Meitheamh
Meh-hiv
June
Iuil
Oo-il
July
Lúnasa
Loo-nasa
August
Meán Fomhar
Man-four
September
Deireadh Fomhair
Derra-four
October
Samhain
S-ow-win
November
Mína Nollaig
Meena- Null-ig
December
By the way, some might be confused to why I put 'mína Nollaig' instead of just 'Nollaig'.
The reason for this is because 'Nollaig' literally translates to 'Christmas' so 'Míne Nollaig' is basically saying 'The Month of Christmas'.
