It’s 12 o’clock (Alternative clock system).

12:00

It’s 12 o’clock.

Correct answer

23:00

It’s 11 o’clock.

Error: 1 hour earlier

13:00

It’s 1 o’clock.

Error: 1 hour later

18:00

It’s 6 o’clock.

Error: read hour hand as if it were in the opposite position