Father's Day falls on the third Sunday of June, so it always lands between the 15th and the 21st. Around it sits the fullest fortnight of the British summer calendar: Trooping the Colour, Royal Ascot, the Glastonbury festival, school sports days, and Wimbledon getting under way in the last days of the month.
All 30 days of June 2026 count as ordinary working days apart from the weekends, with no public holiday anywhere in the country to subtract. That gives the month one of the highest working-day totals of the year and makes it a natural place to schedule anything that needs an uninterrupted run of weeks.
The move from June into July takes the country from the season of long evenings into the season of actually going somewhere. June 2026 hands over the solstice and the last of the school term to the month when the roads, airports and coastal towns fill up in earnest.