There are 217 sleeps (217 days) until May 28 (Friday, May 28, 2027).
There are 217 days until May 28 (Friday, May 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 May 28. Sleeps are the same as days.
217 sleeps is 31 weeks.