Below, you can view dates for the academic year 2025 to 2026 at ACS Hillingdon. If you have any queries, please contact the school office.
| Pre Planning (teachers) | 11-15 August 2025 |
| First Day of School (students) | 18 August 2025 |
| Autumn Break | 20-21 October 2025 |
| Winter Break | 18 December 2025 – 6 January 2026 |
| February Break | 16-20 February 2026 |
| Spring Break | 30 March – 10 April 2026 |
| Last day of School (students) | 17 June 2026 |
| Post-Planning (teachers) | 18-19 June 2026 |
Student Progress Conferences 2025-2026
| Thursday 16th October 2025, 3.45-7pm | All School |
| Friday 17th October 2025, 8.30-3.30 | All School |
| Wednesday 4th March 2026, 2.00-4.45pm | Grade 12 |
| Thursday 26th March 2026, 3.45-7pm | Pre-K to Grade 11 |
| Friday 27th March 2026, 8.30-3.30 | Pre-K to Grade 11 |
