It’s 29 to 5 (Official clock system).

04:31

It’s 29 to 5.

Correct answer

04:30

It’s half past 4.

Error: 1 minute earlier

03:53

It’s 7 to 4.

Error: read minutes starting from hour markings and adding minutes

06:20

It’s 20 past 6.

Error: confuse hour and minute hands