It’s 20 past 12 (Official clock system).

00:20

It’s 20 past 12.

Correct answer

11:40

It’s 20 to 12.

Error: mirror minute hand about the vertical axis

00:04

It’s 4 past 12.

Error: read minutes as hours with ‘past’ or ‘to’

04:00

It’s 4 o’clock.

Error: confuse hour and minute hands