There are 56 sleeps (56 days) until December 18 (Friday, December 18, 2026).
There are 56 days until December 18 (Friday, December 18, 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 December 18. Sleeps are the same as days.
56 sleeps is 8 weeks.