It’s 21 to 2 (Official clock system).

01:39

It’s 21 to 2.

Correct answer

01:40

It’s 20 to 2.

Error: 1 minute later

00:53

It’s 7 to 1.

Error: read minutes starting from hour markings and adding minutes

08:05

It’s 5 past 8.

Error: confuse hour and minute hands