It’s 3 past 8 (Alternative clock system).

20:03

It’s 3 past 8.

Correct answer

20:02

It’s 2 past 8.

Error: 1 minute earlier

20:15

It’s a quarter past 8.

Error: read minutes starting from hour markings and adding minutes

13:40

It’s 20 to 2.

Error: confuse hour and minute hands