It’s a quarter past 9 (Alternative clock system).

21:15

It’s a quarter past 9.

Correct answer

20:45

It’s a quarter to 9.

Error: mirror minute hand about the vertical axis

21:03

It’s 3 past 9.

Error: read minutes as hours with ‘past’ or ‘to’

15:15

It’s a quarter past 3.

Error: quarter past 3