Previously, we learned how to tell time specifically by hour. To say that the time is at 30 minutes (7:30, for example) you use はん, "han" (半). 半 means "half." It is placed after じ (時), the hour.
いまはごぜんよおじはんです。 (ima wa gozen yoji han desu)
It is 4:30 AM right now.
To say a specific minute, such as 9:03, you have to use a counter for minutes. The counter for minutes is ~ぷん, "~pun" (分). However, take note of the ones pronounced differently.
1 minute いっぷん (ippun) 一分
2 minutes にふん (nifun) 二分
3 minutes さんぷん (sanpun) 三分
4 minutes よんぷん (yonpun) 四分
5 minutes ごふん (gofun) 五分
6 minutes ろっぷん (roppun) 六分
7 minutes ななふん (nanafun) 七分
8 minutes はっぷん, はちふん (happun, hachifun) 八分
9 minutes きゅうふん (kyuufun) 九分
10 minutes じゅっぷん (jyuppun) 十分
30 minutes さんじゅっぷん (sanjyuppun) 三十分
The kanji 分 is pronounced "pun" but sometimes it is read as "fun." For 2, 5, 7, and 9 minutes, 分 is pronounced "fun." For 8, both はっぷん (happun), and はちふん (hachifun) is accepted. Also, we learned that 30 minutes is はん (半). さんじゅっぷん (sanjyuppun) is also used.
Be sure to remember that 2, 5, 7, and 9 is pronounced differently from the rest!