There are 323 sleeps (323 days) until September 11 (Saturday, September 11, 2027).
There are 323 days until September 11 (Saturday, September 11, 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 September 11. Sleeps are the same as days.
323 sleeps is 46 weeks and 1 sleep.