There are 240 sleeps (240 days) until June 20 (Sunday, June 20, 2027).
There are 240 days until June 20 (Sunday, June 20, 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 June 20. Sleeps are the same as days.
240 sleeps is 34 weeks and 2 sleeps.