The clocks go forward on the last Sunday of March, at one in the morning, when 1 am becomes 2 am and that hour simply does not exist. British Summer Time then runs until the last Sunday of October. It is the change people notice most, because it moves an hour of daylight into the evening overnight and takes an hour of sleep to pay for it.
The working-day count for March 2028 holds across most of the country, since the 31 days of the month carry a bank holiday only in Northern Ireland, on the 17th — and in years where Easter comes early enough for Good Friday to fall inside March rather than in April. Elsewhere it is a full month of five-day weeks.
March 2028 runs to 31 days and completes the first quarter of a year of 366 days. The tax year that began the previous April has less than a week left to run once the month ends, and the new one starts before April is a week old.