There are 50 sleeps (50 days) until December 12 (Saturday, December 12, 2026).
There are 50 days until December 12 (Saturday, December 12, 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 12. Sleeps are the same as days.
50 sleeps is 7 weeks and 1 sleep.