There are 280 sleeps (280 days) until July 30 (Friday, July 30, 2027).
There are 280 days until July 30 (Friday, July 30, 2027) — one sleep per night.
One sleep per night between now and the big day — tonight is the first sleep, and the morning after the last sleep is July 30. Sleeps are the same as days.
280 sleeps is 40 weeks.