Days are built with Dé: Dé Luain is Monday. For a habit use ar an plus the day - ar an Luan means "on Mondays". Months take i mí: i mí Bealtaine. Days and months keep their capitals.
Examples
- Tá rang agam Dé Céadaoin.
- I have a class on Wednesday.
- I mí Aibreáin táim ag dul go Vín.
- In April I'm going to Vienna.
- Ní oibrím ar an Domhnach.
- I don't work on Sundays.
The mistake to avoid
Dé Luain is one particular Monday; ar an Luan is every Monday.
Where this fits in
Numbers, days, time, Irish Gaelic A1: Count, talk about days and months, give the time, and handle numbers in real situations.