It’s 21 past 12 (Alternative clock system).

12:21

It’s 21 past 12.

Correct answer

12:22

It’s 22 past 12.

Error: 1 minute later

12:05

It’s 5 past 12.

Error: read minutes starting from hour markings and adding minutes

16:00

It’s 4 o’clock.

Error: confuse hour and minute hands