It’s 17 to 5 (Official clock system).

04:43

It’s 17 to 5.

Correct answer

04:44

It’s 16 to 5.

Error: 1 minute later

03:49

It’s 11 to 4.

Error: read minutes starting from hour markings and adding minutes

09:20

It’s 20 past 9.

Error: confuse hour and minute hands