There are 128 sleeps (128 days) until February 28 (Sunday, February 28, 2027).
There are 128 days until February 28 (Sunday, February 28, 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 28. Sleeps are the same as days.
128 sleeps is 18 weeks and 2 sleeps.