From Wiktionary, the free dictionary
From Old Irish Lugnasad (“Lammas”).
an Lùnastal m (genitive Lùnastail)
- August (eighth month of the Gregorian calendar)
- Lammas
- (Gregorian calendar months) Faoilleach, Gearran, Màrt, Giblean, Cèitean, Ògmhios, Iuchar, Lùnastal, Sultain, Dàmhair, Samhain, Dùbhlachd (Category: gd:Gregorian calendar months)