The school year begins in the first week of September in England, Wales and Northern Ireland, usually with a training day before the pupils arrive. Scotland has been back since the middle of August, so September 2026 opens with two school calendars several weeks out of step — one starting the year, the other already a month into it.
All 30 days of September 2026 are ordinary working days outside the weekends, with nothing subtracted anywhere in the United Kingdom. Together with October it forms the longest continuous run of full working weeks in the British year.
The turn from September into October takes the country into the part of the year it is best known for: leaf colour through the second half of the month, the first named storms of the Atlantic season, and the first frosts inland well before the coast sees any.