At 8 o'clock yesterday he was going to school.
At 13:00 yesterday he was having lunch at school.
At 14:00 yesterday he was at school.
At 16:00 yesterday he was listening to music.
At 18:00 yesterday he was playing football.
At 19:00 yesterday he was having dinner.
At 20:00 yesterday he was doing his homework.
At 23:00 yesterday he was sleeping.