My school is 8:30 - 2:40 every day.
We have 6 or 7 weeks summer holidays, 2 weeks for Christmas, 2 weeks for Easter and 3 weeks half term.
We normally go back on the first week of September - it's September 2nd this year.
There's:
Infants - Nursery to Year 2
Juniors - Year 3 to Year 6
Secondary - Year 7 - Year 13
Although most people who go to my school went to a primary school which is the infants and juniors combined.