0時 or 零時 (れいじ/reiji) → “0 o’clock”

12時(じゅうにじ/jyuuniji) → “12 o’clock”

11時(じゅういちじ/jyuuichiji) → “11 o’clock”

10時(じゅうじ/jyuuji) → “10 o’clock”

9時(くじ/kuji) → “9 o’clock” (The last tricky one - notice that “9” is pronounced as “く/ku” here, not “きゅう/kyuu”)

8時(はちじ/hachiji) → “8 o’clock”

7時(しちじ/shichiji) → “7 o’clock” (Here’s another tricky pronunciation that will need your attention lol)

6時(ろくじ/rokuji) → “6 o’clock”

5時(ごじ/goji) → “5 o’clock”

4時(よじ/yoji) → “4 o’clock” (Pay attention to this pronunciation! Do you remember I explained at the Numbers episode that “4” can have different pronunciations, depending on what word comes after? Here’s one example! “4 o’clock” is pronounced “よじ/yoji”, not “よんじ/yonji” or “しじ/shiji”)