Interesting. Last year’s folks relied on reports from the year before. 
Please update info on decision release based on current information . This will be a wiki so anyone can edit it.
Here is 2024 for reference.
Andover - 7am (Portal)
Avon Old Farms - 12am (portal)
BBN - M9 12:00pm (Email)
Beaver Country Day - 6:00 AM (portal)
Berkshire - 8 am (portal)
Blair- “Before 8 am” (Email)
Boston University Academy- 3pm
Brooks - 9am (portal)
Buxton -
Cambridge School of Weston - midnight (email/portal)
Canterbury - 12am (email/portal)
Cate- 11am EST, 8am PST
Choate- 8am (Portal)
Commonwealth School- 3pm
Concord Academy - 7am EST
Deerfield - (email)
Dublin - 7am (email)
Episcopal - 12:01 am EST (email)
Exeter- 8am (Portal)
Fay -
Fenn - 9 am (Portal)
George- midnight (email)
Governor’s - 8am EST (Govs Portal)
Groton -
Hill - 7am (portal)
Hotchkiss- 9am (Portal)
Kent - midnight (email)
Lawrencevile - “Morning” (portal)
Loomis - 8am EDT (portal)
Mercersburg - 10am (portal)
Middlesex- 9am (email)
Milton - 9am (portal)
Miss Porter’s - March 9th, 6:45pm EST (portal)
NMH - 7am (email)
Noble and Greenough School- 3pm
Proctor - 4pm EST
Pomfret -
PDS- Email
Peddie-
Rivers - 3:00 PM (portal)
Salisbury - email (12am)
St. Andrew’s - 8am (email)
St. George’s - “morning” (portal)
St. Mark’s - midnight (email)
St. Paul’s- 8am (Email & Portal)
St. Seb’s - 3:00 PM (portal)
Tabor - midnight (email & portal)
Taft - midnight (email & portal)
Thacher - 11am EST, 8 am PST
Westminster - 7am EST (portal)
Williston -