There are 3 sleeps (3 days) until October 27 (Tuesday, October 27, 2026).
There are 3 days until October 27 (Tuesday, October 27, 2026) — 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 27. Sleeps are the same as days.
3 sleeps is 0 weeks and 3 sleeps.