Here are all the 12 months in Japanese. The Kanji symbol 月 can be read in 3 ways: TSUKI, GETSU, and GATSU. When saying the name of each month, we use only GATSU.
Wrong: Hitotsu-gatsu, Hito-gatsu
Wrong: Futatsu-gatsu, Futa-gatsu
Wrong: Mi-gatsu, Mitsu-gatsu
Wrong: Yo-gatsu, Yon-gatsu
I’ve heard someone say YON-GATSU. Is it wrong?
Not completely wrong and it’s understandable. But Shi-gatsu is a common way of reading.
The pronunciations of Shi-gatsu and Ni-gatsu are similar, so if you can’t catch the word in spoken conversation or on a phone, we sometimes say YON-gatsu to make it clear that it points out April.
Wrong: Mu-gatsu, Mutsu-gatsu
You may hear someone call July Nana-gatsu. The same as Shi-gatsu (April), we sometimes use Nana-gatsu to specify that it means seven. Also, I think the people from Western Japan tend to call the number 7 NANA. They sometimes call July NANA-gatsu and 7 o’clock NANA-ji. It’s a kind of dialect.
Wrong: Ya-gatsu, Yatsu-gatsu
That’s all for the 12 months name in Japanese! Please comment if you have any questions about this post.