How do you say days Gaelic?

There isn't one single Gaelic language. There are two main branches:

* Scottish Gaelic: The days of the week are:

* Monday: Diluain

* Tuesday: Dimàirt

* Wednesday: Diciadain

* Thursday: Diardaoin

* Friday: Dihaoine

* Saturday: Disathairne

* Sunday: Didòmhnaich

* Irish Gaelic: The days of the week are:

* Monday: Luan

* Tuesday: Máirt

* Wednesday: Céadaoin

* Thursday: Déardaoin

* Friday: Aoine

* Saturday: Satharn

* Sunday: Domhnach

So you need to specify which Gaelic you mean to get the correct answer.