The days of the week in Irish

• Dé Luain: Monday.
• Dé Máirt: Tuesday.
• Dé Céadaoin: Wednesday.
• Déardaoin: Thursday.
• Dé hAoine: Friday.
• Dé Sathairn: Saturday.
• Dé Domhnaigh: Sunday.

The days of the week in Irish (in the genitive case)

• [Rud éigin] an Luain: Monday's [something].
• [Rud éigin] na Márta: Tuesday's [something].
• [Rud éigin] na Céadaoine: Wednesday's [something].
• [Rud éigin] na Déardaoine: Thursday's [something].
• [Rud éigin] na hAoine: Friday's [something].
• [Rud éigin] an tSathairn: Saturday's [something].
• [Rud éigin] an Domhnaigh: Sunday's [something].

Notes

• Never use the grossly erroneous form 'Dé Déardaoin'.
• The form Dé Céadaoine occurs in Ulster.