There are 48 sleeps (48 days) until December 10 (Thursday, December 10, 2026).
There are 48 days until December 10 (Thursday, December 10, 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 10. Sleeps are the same as days.
48 sleeps is 6 weeks and 6 sleeps.