There are 80 sleeps (80 days) until January 11 (Monday, January 11, 2027).
There are 80 days until January 11 (Monday, January 11, 2027) — 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 January 11. Sleeps are the same as days.
80 sleeps is 11 weeks and 3 sleeps.