There are 144 sleeps (144 days) until March 16 (Tuesday, March 16, 2027).
There are 144 days until March 16 (Tuesday, March 16, 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 16. Sleeps are the same as days.
144 sleeps is 20 weeks and 4 sleeps.