There are 342 sleeps (342 days) until October 1 (Friday, October 1, 2027).
There are 342 days until October 1 (Friday, October 1, 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 1. Sleeps are the same as days.
342 sleeps is 48 weeks and 6 sleeps.