There are 359 sleeps (359 days) until October 18 (Monday, October 18, 2027).
There are 359 days until October 18 (Monday, October 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 October 18. Sleeps are the same as days.
359 sleeps is 51 weeks and 2 sleeps.