Credit to @Atria , too! Copied her list and pasted. Any changes for this year, can be added to the thread, as needed, but this should give y’all a starting place!
Credit to @stargirl3 for compiling this list on google sheets… Just pasted it here
Andover: Available on Gateway 5:00 PM ET…FedEx acceptances mailed M10 → snail mail deny/waitlisted…check email: decision at 5pm, March 10 on Andover web portal
Blair: M10 online admission portal by 7 am-> letter mailed on M10
Brooks: M10 online admission portal by 5 am-> email sent out one week prior to make sure everyone can log in
Cambridge School of Weston : paper mail on M10
Canterbury: M10 email-> Followed by a letter
Cate: Email on M10 → Followed by a letter
Choate: M10 3:00 PM EST on GoChoate ->Followed by a letter
Concord: Email on M10
Cranbrook: M10 Email @ 12 AM
Deerfield: M10 email between 6:30 and 8 AM EST → Followed by a letter
Emma Willard: Email on morning of M10
Episcopal: M10 9:00 AM (email)
Exeter: Email on M10 @ 6:00am ET/Exact time frame from email-> Letter/package to follow
George: M10 email and through admission portal
Governor’s: Online @ 12 noon (or 10 am)-> mail sent on M10
Groton: M10 online @ 6:00 PM-> Followed by letter
Hill: Email sent out to make sure portal works → M10 6:00 AM/3:00 pm on online platform → letter follows.
Hotchkiss : M10 @ 6:30 AM EST online → Letter arrive on M10
Kent : M9 Online (email) @ 5:00 PM EST-> Postal letters will be mailed to arrive on March 10
Kimball Union : M10
Lawrence Academy : M10 on Portal 8:00 AM EST-> Letters Mailed on M10
Lawrenceville: M10 @ 9:00 AM EST through Lawrenceville Admission Portal
Loomis Chaffee: M10 @ 8:00 AM through Explore_Loomis (Send an Email with link and time earlier)
Masters: M10 3PM
Mercersburg: M10 @ 12:01 AM-> Letter M10
Middlesex: M10 @ 9:30 AM
Milton-> letter mailed M10 => rejection=email at 1PM + snail mail/accepted=fed ex package on M10
Miss Porter’s: Online on Portal on M9 @ 8:00 PM-> letter mailed M10
New Hampton : M10 or (I am not sure what this means but) → electronically notified today (3/7) at 6pm
Noble and Greenough: M10 @ 9:00 AM through admission portal
Northfield Mount Hermon: M8 @ 7:00 AM-> letter might be sent out
Peddie: M10 @ 12:00 AM (email)-> followed by a letter
Pomfret: Online @ 12:01am on M10-> M10 snail mail
Princeton Day School: Mailed on M10
St. Andrew’s (DE): Mailed March 10 (link on the google sheets)
St. George’s: emailed at 12:01 AM on M10
St. Mark’s (MA): M10 email @ 6am-> website says mailed M10 (send email to students one week prior to confirm email address. Parents and student emailed acceptance video at 6am for 9th grade)
St. Paul’s: M10 @ 3:00 PM online, instructions sent on M1-> Followed by letter mailed onM10
Suffield Academy: M10 email
Tabor: acceptance letter on M10
Taft: M10 through portal @ 8:00 am (they might send it out at midnight)-> letter follows M10
Thacher: email on M10 @ 4 PM PST
Thayer Academy: Snail mail: acceptance and rejections
Tilton: letter M10 (Tilton has link to get text notice on M7)
Webb Schools (CA): Log in on M10-> followed by email-> Followed by letter
Westminster: Email on M10
Westover: USPS parcel
Williston Northampton: Email on M7-> letter M10 (Email came in at 5pm)
Woodberry Forest-> M10 6 a.m. email-> Followed by parcel about 1 week later
Worcester: Online M14 or M10@12:01 am posted online

 I’ll feed her anxiety with pain au chocolat and crepes au nutella et banane! Espresso, for me.
 I’ll feed her anxiety with pain au chocolat and crepes au nutella et banane! Espresso, for me.