Monday
月曜日
Getsuyoubi
Tuesday
火曜日
Kayoubi
Wednesday
水曜日
Suiyoubi
Thursday
木曜日
Mokuyoubi
Friday
金曜日
Kinyoubi
Saturday
土曜日
Doyoubi
Sunday
日曜日
Nichiyoubi
Months:
Number + 月 (Gatsu)
For example:
1月 - January
2月 - February
You can also use 一月 and 二月, but using regular numbers is a lot more common.
Pronunciation (In order of the months):
Ichigatsu, nigatsu, sangatsu, shigatsu, gogatsu, rokugatsu, nanagatsu, hachigatsu, kyuugatsu, juugatsu, juuichigatsu, juunigatsu