It’s a quarter past 8.

20:15

It’s a quarter past 8.

Error: read digital clock as if it were an analogue clock

20:15

It’s a quarter past 8.

Error: read quarter as a number

19:45

It’s a quarter to 8.

Error: confuse ‘past’ and ‘to’

19:45

It’s a quarter to 8.

Error: confuse ‘past’ and ‘to’ and read quarter as number