Days of the Week, Months, and Seasons

Làithean na seachdain (Days of the week)
Didòmhnaich = Sunday
Diluain = Monday
Dimàirt = Tuesday
Diciadain = Wednesday
Diardaoin = Thursday
Dihaoine = Friday
Disathairne = Saturday

Mìosan (Months)
am Faoilleach = January
an Gearran = February
am Màrt = March
an Giblean = April
an Cèitean = May
an t-Ògmhìos = June
an t-Iuchar = July
an Lùnasdal = August
an t-Sultain = September
an Dàmhair = October
an t-Samhain = November
an Dùbhlachd = December

Ràithean (Seasons)
an t-Earrach = Spring
an Samhradh = Summer
an Foghar = Autumn
an Geamhradh = Winter

To hear how these are said, either listen here (click on Faclan Feumail 7; they're the first half of the sound file): http://www.edu.pe.ca/gray/class_pages/rxmacdonald/gaelicclass/classindex.html

Or check out BBC's site,
Seasons: http://www.bbc.co.uk/alba/foghlam/beag_air_bheag/units/unit_32/
Days of the Week: http://www.bbc.co.uk/alba/foghlam/beag_air_bheag/units/unit_04/

Some of the words also have IPA and/or sound files in this dictionary: http://www.faclair.com/