8.104 non-defining clauses
'When' and 'where' are used in non-defining clauses.
- I want to see you at 12 o'clock, when you go to your lunch.
- Dan's fondest memory is of last year, when the club gave a tea party for the Queen Mother.
- He came from Herne Bay, where Lally had once spent a holiday.
- She carried them up the stairs to the art room, where the brushes and paints had been set out.