There are 69 sleeps (69 days) until December 31 (Thursday, December 31, 2026).
There are 69 days until December 31 (Thursday, December 31, 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 31. Sleeps are the same as days.
69 sleeps is 9 weeks and 6 sleeps.