It’s 12 past 8 (Official clock system).

08:12

It’s 12 past 8.

Correct answer

08:13

It’s 13 past 8.

Error: 1 minute later

08:04

It’s 4 past 8.

Error: read minutes starting from hour markings and adding minutes

02:40

It’s 20 to 3.

Error: confuse hour and minute hands