Easter holidays: Easter falls on the 1st April, so most schools will break up either March 29th or Friday 30th, through until back to school on Monday 16th April.
May half term: Monday 28th May - Friday 1st June. Back to school on Monday 4th June.
Summer holidays: Usually schools end either the 24th/25th July until Monday 3rd September.
October half term: Monday 26th October - Friday 30th October
Christmas holidays: 21st December - 9th January. (This may slightly vary depending on your school).