There are 356 sleeps (356 days) until October 15 (Friday, October 15, 2027).
There are 356 days until October 15 (Friday, October 15, 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 15. Sleeps are the same as days.
356 sleeps is 50 weeks and 6 sleeps.