There are 145 sleeps (145 days) until March 17 (Wednesday, March 17, 2027).
There are 145 days until March 17 (Wednesday, March 17, 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 March 17. Sleeps are the same as days.
145 sleeps is 20 weeks and 5 sleeps.