It’s 1 to 1 (Official clock system).

12:59

It’s 1 to 1.

Correct answer

13:00

It’s 1 o’clock.

Error: 1 minute later

23:49

It’s 11 to 12.

Error: read minutes starting from hour markings and adding minutes

00:00

It’s 12 o’clock.

Error: confuse hour and minute hands