The Ramadan calendar will be published after the dates are confirmed.
How Suhoor and Iftar times are set
The fast begins at Fajr (true dawn) and ends at Maghrib (sunset). Suhoor must be finished before Fajr; Iftar is at Maghrib. Some timetables also show Imsak, a few minutes before Fajr, as a safety margin; it is not a separate prayer time.
Fasting hours depend on latitude and the season. In the northern United States they are longest in summer and shortest in winter; because Ramadan moves about 11 days earlier each year, the length of the fast changes from year to year.