There are 120 sleeps (120 days) until February 20 (Saturday, February 20, 2027).
There are 120 days until February 20 (Saturday, February 20, 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 February 20. Sleeps are the same as days.
120 sleeps is 17 weeks and 1 sleep.