There are 207 sleeps (207 days) until May 18 (Tuesday, May 18, 2027).
There are 207 days until May 18 (Tuesday, May 18, 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 18. Sleeps are the same as days.
207 sleeps is 29 weeks and 4 sleeps.