There are 358 sleeps (358 days) until October 17 (Sunday, October 17, 2027).
There are 358 days until October 17 (Sunday, October 17, 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 17. Sleeps are the same as days.
358 sleeps is 51 weeks and 1 sleep.