There are 299 sleeps (299 days) until August 18 (Wednesday, August 18, 2027).
There are 299 days until August 18 (Wednesday, August 18, 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 August 18. Sleeps are the same as days.
299 sleeps is 42 weeks and 5 sleeps.