There are 277 sleeps (277 days) until July 27 (Tuesday, July 27, 2027).
There are 277 days until July 27 (Tuesday, July 27, 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 27. Sleeps are the same as days.
277 sleeps is 39 weeks and 4 sleeps.