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More detailed calendars are available to the Community via the Student, Parent, and Employee portals.

2023-2024 Major Dates Calendar [updated 7/24/23]

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October 2023
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Sun, Oct 1

It's Academic Game

Interface Media Group
Sea Devils
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NCAP
-
Mon, Oct 2

Admissions Tours Start

Sukkot
Monday Blue

US Class Meetings
-

Simms Reception Room

College Visits
-

Simms Reception Room
MS Volleyball B vs. St. Andrew's School (Away)
JV Soccer vs. Holy Child (Home)
Sea Devils
-

US Fall Musical Rehearsal
-

James Whittier Lewis Theater
NCAP
-
Tue, Oct 3
Subscribe to Alerts
Sukkot
Subscribe to Alerts Tuesday Blue
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts JV Volleyball vs. Stone Ridge School (Away)
Subscribe to Alerts JV Tennis vs. Potomac (Home)
Subscribe to Alerts Varsity Tennis vs. Potomac (Away)
Subscribe to Alerts Varsity Field Hockey vs. Stone Ridge School (Away)
Subscribe to Alerts Varsity Cross Country vs. Landon School (Away)
Subscribe to Alerts NCAP
-
Subscribe to Alerts Varsity Volleyball vs. Stone Ridge School (Away)
Subscribe to Alerts JV Field Hockey vs. Stone Ridge School (Away)
Subscribe to Alerts
US Fall Musical Rehearsal
-
Subscribe to Alerts
College Counseling Parent Speaker: Jeff Selingo
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James Whittier Lewis Theater
Subscribe to Alerts Sea Devils
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Wed, Oct 4
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Sukkot
Subscribe to Alerts Wednesday Blue
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Wednesday Late Start - 9:10 a.m.
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts MS Cross Country vs. Landon School (Away)
Subscribe to Alerts MS Fall Tennis vs. Holy Child (Home)
Subscribe to Alerts MS Soccer A vs. Holy Child (Home)
Subscribe to Alerts MS Field Hockey A vs. Holy Child (Away)
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts
US Fall Musical Rehearsal
-

James Whittier Lewis Theater
Subscribe to Alerts NCAP
-
Thu, Oct 5
Subscribe to Alerts
Sukkot
Subscribe to Alerts Thursday Blue
Subscribe to Alerts
College Visits
-

Advancement Hallway
Subscribe to Alerts Varsity Volleyball vs. National Cathedral School (Home)
Subscribe to Alerts JV Volleyball vs. National Cathedral School (Home)
Subscribe to Alerts Varsity Tennis vs. Stone Ridge School (Home)
Subscribe to Alerts JV Tennis - Stone Ridge at Cedarbrook Swim & Tennis Club (Away)
Subscribe to Alerts Varsity Soccer vs. St. Stephen's/St. Agnes School (Away)
Subscribe to Alerts JV Soccer vs. St. Stephen's/St. Agnes School (Home)
Subscribe to Alerts Varsity Field Hockey vs. Visitation (Away)
Subscribe to Alerts NCAP
-
Subscribe to Alerts JV Field Hockey vs. Visitation (Away)
Subscribe to Alerts
US Fall Musical Rehearsal
-

James Whittier Lewis Theater
Subscribe to Alerts Sea Devils
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Fri, Oct 6
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Sukkot
Subscribe to Alerts Friday Blue
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5th Grade Parent Coffee
-

Simms Reception Room
Subscribe to Alerts
US Holton/Landon Collaboration
-
Subscribe to Alerts
US Class Retreats
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Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts MS Volleyball A vs. Potomac (Home)
Subscribe to Alerts MS Volleyball B vs. Potomac (Home)
Subscribe to Alerts MS Volleyball C vs. Bullis (Away)
Subscribe to Alerts Varsity Cross Country - Rush Hour Rumble (Away)
Subscribe to Alerts NCAP
-
Subscribe to Alerts Sea Devils
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Subscribe to Alerts
US Improv Performance
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Landon PAC
Sat, Oct 7
Subscribe to Alerts Sea Devils
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Subscribe to Alerts NCAP
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Sun, Oct 8
Subscribe to Alerts Sea Devils
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Subscribe to Alerts NCAP
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Mon, Oct 9
Subscribe to Alerts
Fall Break - School Closed
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Indigenous People's Day
Tue, Oct 10
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VAMUN
Subscribe to Alerts Tuesday White
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PA Executive Board Meeting
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Fathers Club Lounge
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts Varsity Tennis vs. Visitation (Home)
Subscribe to Alerts JV Tennis vs. Visitation (Away)
Subscribe to Alerts Varsity Soccer vs. St. Mary's Ryken High School (Home)
Subscribe to Alerts NCAP
-
Subscribe to Alerts
US Fall Musical Rehearsal
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James Whittier Lewis Theater
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Belize Information Meeting
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Dining Room
Subscribe to Alerts Sea Devils
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Wed, Oct 11
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VAMUN
Subscribe to Alerts Wednesday White
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Senior SAT
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Simms Reception Room
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Wednesday Late Start - 9:10 a.m.
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LS Field Day
-
Subscribe to Alerts
College Visits
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Simms Reception Room
Subscribe to Alerts MS Field Hockey B vs. Sidwell (Home)
Subscribe to Alerts
College Athletics Alumnae Panel
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Lecture Hall
Subscribe to Alerts MS Volleyball A vs. Sidwell (Home)
Subscribe to Alerts MS Volleyball B - Barnesville School (Home)
Subscribe to Alerts MS Fall Tennis vs. Sidwell (Away)
Subscribe to Alerts MS Soccer A vs. Sidwell (Home)
Subscribe to Alerts MS Soccer B vs. Sidwell (Away)
Subscribe to Alerts MS Cross Country vs. Norwood School (Away)
Subscribe to Alerts JV Volleyball vs. Flint Hill School - US (Home)
Subscribe to Alerts Varsity Volleyball vs. Flint Hill School - US (Home)
Subscribe to Alerts JV Tennis vs. Bullis (Home)
Subscribe to Alerts Varsity Tennis vs. Bullis (Away)
Subscribe to Alerts Varsity Field Hockey vs. Flint Hill School - US (Away)
Subscribe to Alerts Sea Devils
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Subscribe to Alerts JV Field Hockey vs. Flint Hill School - US (Away)
Subscribe to Alerts
US Fall Musical Rehearsal
-

James Whittier Lewis Theater
Subscribe to Alerts
Virtual Holton Fund Parent Training
-

Virtual
Subscribe to Alerts NCAP
-
Thu, Oct 12
Subscribe to Alerts
VAMUN
Subscribe to Alerts Thursday White
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts Varsity Soccer vs. Stone Ridge School (Home)
Subscribe to Alerts JV Soccer vs. Stone Ridge School (Away)
Subscribe to Alerts NCAP
-
Subscribe to Alerts
US Fall Musical Rehearsal
-

James Whittier Lewis Theater
Subscribe to Alerts Sea Devils
-
Fri, Oct 13
Subscribe to Alerts Friday White
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts MS Volleyball C vs. Georgetown Day School - Middle School (Home)
Subscribe to Alerts MS Field Hockey A vs. St. Stephen's/St. Agnes School (Home)
Subscribe to Alerts Varsity Cross Country vs. Mercersburg Academy (Away)
Subscribe to Alerts JV Tennis vs. Episcopal High School (Home)
Subscribe to Alerts Varsity Tennis vs. Episcopal High School (Away)
Subscribe to Alerts Varsity Field Hockey vs. Bullis (Away)
Subscribe to Alerts NCAP
-
Subscribe to Alerts JV Field Hockey vs. Bullis (Away)
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts
US Fall Musical Rehearsal
-

James Whittier Lewis Theater
Sat, Oct 14
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts
US Fall Musical Set Construction/Costume Fittings
-

James Whittier Lewis Theater
Subscribe to Alerts NCAP
-
Subscribe to Alerts
Butler's Orchard Blue and White Gathering
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Butler's Orchard
Subscribe to Alerts
HAMUN
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James Whittier Lewis Theater
Sun, Oct 15
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts NCAP
-
Mon, Oct 16
Subscribe to Alerts Monday Blue
Subscribe to Alerts
US Class Meetings
-

Simms Reception Room
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts MS Volleyball B vs. Georgetown Day School - Middle School (Home)
Subscribe to Alerts MS Fall Tennis vs. Georgetown Day School - Middle School (Home)
Subscribe to Alerts MS Volleyball A vs. Georgetown Day School - Middle School (Away)
Subscribe to Alerts MS Volleyball C vs. McLean School (Home)
Subscribe to Alerts MS Soccer B vs. Georgetown Day School - Middle School (Away)
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts
US Fall Musical Rehearsal
-
Subscribe to Alerts NCAP
-
Tue, Oct 17
Subscribe to Alerts Tuesday Blue
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts
ISMAW Math Meet
-

Washington Episcopal School
Subscribe to Alerts JV Volleyball vs. Potomac (Home)
Subscribe to Alerts Varsity Tennis vs. Sidwell (Home)
Subscribe to Alerts JV Tennis vs. Sidwell (Away)
Subscribe to Alerts Varsity Soccer vs. Maret School (Home)
Subscribe to Alerts Varsity Field Hockey vs. Potomac (Away)
Subscribe to Alerts NCAP
-
Subscribe to Alerts Varsity Volleyball vs. Potomac (Home)
Subscribe to Alerts JV Field Hockey vs. Potomac (Away)
Subscribe to Alerts
Gr.7 Digital Wellness Night
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Dining Room
Subscribe to Alerts
US Fall Musical Rehearsal
-
Subscribe to Alerts Sea Devils
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Wed, Oct 18
Subscribe to Alerts Wednesday Blue
Subscribe to Alerts
MS Field Day/Landon Collaboration
-
Subscribe to Alerts
Wednesday Late Start - 9:10 a.m.
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts MS Field Hockey B vs. Holy Child (Home)
Subscribe to Alerts
Gr.3 & 12 Buddies Event - Cider and Donuts
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Dining Room
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts
Gr. 10 Alcohol Symposium
-

James Whittier Lewis Theater
Subscribe to Alerts NCAP
-
Thu, Oct 19
Subscribe to Alerts Thursday Blue
Subscribe to Alerts
6th Grade Parent Coffee
-

Simms Reception Room
Subscribe to Alerts
Upper School Open House
-

Register here: https://tinyurl.com/HASUS23
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts JV Volleyball vs. Madeira (Away)
Subscribe to Alerts Varsity Soccer vs. Madeira (Away)
Subscribe to Alerts JV Soccer vs. Madeira (Home)
Subscribe to Alerts Varsity Field Hockey vs. Episcopal High School (Home)
Subscribe to Alerts NCAP
-
Subscribe to Alerts Varsity Volleyball vs. Madeira (Away)
Subscribe to Alerts JV Field Hockey vs. Episcopal High School (Home)
Subscribe to Alerts
US Fall Musical Rehearsal
-
Subscribe to Alerts
Junior Journey Information Meeting
-

Dining Room
Subscribe to Alerts Sea Devils
-
Fri, Oct 20
Subscribe to Alerts
WAISDEA Master Class

Sandy Spring
Subscribe to Alerts Friday Blue
Subscribe to Alerts
4th Grade Parent Coffee
-

Simms Reception Room
Subscribe to Alerts
X-STEM Conference Field Trip
-

The National Conference Center
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts MS Volleyball A vs. Stone Ridge School (Home)
Subscribe to Alerts MS Fall Tennis vs. Stone Ridge School (Home)
Subscribe to Alerts MS Soccer A vs. Stone Ridge School (Home)
Subscribe to Alerts MS Field Hockey B vs. Stone Ridge School (Home)
Subscribe to Alerts MS Volleyball B vs. Stone Ridge School (Away)
Subscribe to Alerts MS Soccer B vs. Stone Ridge School (Away)
Subscribe to Alerts MS Field Hockey A vs. Stone Ridge School (Away)
Subscribe to Alerts NCAP
-
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts
US Fall Musical Rehearsal
-
Sat, Oct 21
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts Varsity Cross Country - Skip Grant - Derwood (Away)
Subscribe to Alerts NCAP
-
Sun, Oct 22
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts
Lower School Open House
-

Register here: https://tinyurl.com/OHLS23
Subscribe to Alerts
Middle School Open House
-

Register here: https://tinyurl.com/23OHMS
Subscribe to Alerts NCAP
-
Mon, Oct 23
Subscribe to Alerts Monday White
Subscribe to Alerts
US Class Meetings
-

Simms Reception Room
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts MS Fall Tennis vs. St. Andrew's School (Home)
Subscribe to Alerts MS Volleyball A vs. St. Andrew's School (Away)
Subscribe to Alerts Varsity Tennis - ISL Quarterfinal (TBD)
Subscribe to Alerts MS Soccer A vs. St. Andrew's School (Away)
Subscribe to Alerts MS Field Hockey A vs. Potomac (Away)
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts
US Fall Musical Rehearsal
-

James Whittier Lewis Theater
Subscribe to Alerts NCAP
-
Tue, Oct 24
Subscribe to Alerts Tuesday White
Subscribe to Alerts
Junior PSAT
-
Subscribe to Alerts
Gr.9 Class Retreat
-

Gaver Farm
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts Varsity Tennis - ISL Semifinal (TBD)
Subscribe to Alerts JV Volleyball vs. Bullis (Home)
Subscribe to Alerts JV Soccer vs. Sidwell (Away)
Subscribe to Alerts Varsity Soccer vs. Sidwell (Home)
Subscribe to Alerts Varsity Field Hockey vs. Holy Child (Home)
Subscribe to Alerts NCAP
-
Subscribe to Alerts Varsity Volleyball vs. Bullis (Home)
Subscribe to Alerts JV Field Hockey vs. Holy Child (Home)
Subscribe to Alerts
US Fall Musical Rehearsal
-

James Whittier Lewis Theater
Subscribe to Alerts Sea Devils
-
Wed, Oct 25
Subscribe to Alerts Wednesday White
Subscribe to Alerts
Wednesday Late Start - 9:10 a.m.
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts MS Field Hockey B vs. Bullis School (Home)
Subscribe to Alerts MS Volleyball B vs. Bullis (Away)
Subscribe to Alerts MS Soccer B vs. Washington Episcopal School (Home)
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts NCAP
-
Subscribe to Alerts
US Chamber Chorus at Independent Schools Choral Festival - Chorus C
-

National Cathedral
Thu, Oct 26
Subscribe to Alerts Thursday White
Subscribe to Alerts
3rd Grade Parent Coffee
-

Simms Reception Room
Subscribe to Alerts
Grades 3 and 5 Holton/Landon Collaboration at Landon
-

Landon
Subscribe to Alerts
Grades 4 and 6 Holton/Landon Collaboration
-

Dining Room
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts MS Cross Country vs. Norwood School (Away)
Subscribe to Alerts Varsity Tennis - ISL Championship @ Flint Hill (Away)
Subscribe to Alerts JV Volleyball vs. St. Stephen's/St. Agnes School (Away)
Subscribe to Alerts Varsity Field Hockey vs. National Cathedral School (Home)
Subscribe to Alerts NCAP
-
Subscribe to Alerts Varsity Volleyball vs. St. Stephen's/St. Agnes School (Away)
Subscribe to Alerts JV Field Hockey vs. National Cathedral School (Home)
Subscribe to Alerts
US Fall Musical Rehearsal
-

James Whittier Lewis Theater
Subscribe to Alerts Sea Devils
-
Fri, Oct 27
Subscribe to Alerts Friday White
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts MS Volleyball B vs. National Cathedral School (Home)
Subscribe to Alerts MS Soccer A vs. National Cathedral School (Home)
Subscribe to Alerts MS Volleyball A vs. National Cathedral School (Away)
Subscribe to Alerts MS Fall Tennis vs. National Cathedral School (Away)
Subscribe to Alerts MS Field Hockey A vs. National Cathedral School (Away)
Subscribe to Alerts NCAP
-
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts
US Improv Performance
-

Black Box Theater
Sat, Oct 28
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts JV Volleyball - ISL - Playday @ GDS (Away)
Subscribe to Alerts JV Soccer - ISL Playday @ Potomac (Away)
Subscribe to Alerts JV Field Hockey - ISL Playday @ Madeira (Away)
Madeira
Subscribe to Alerts Varsity Cross Country - ISL Champs @ Derwood (Away)
Subscribe to Alerts
US Fall Musical Light Hang/Focus
-

James Whittier Lewis Theater
Subscribe to Alerts NCAP
-
Subscribe to Alerts Varsity Cross Country - ISL XC Champs - Derwood (Away)
Sun, Oct 29
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts NCAP
-
Mon, Oct 30
Subscribe to Alerts Monday Blue
Subscribe to Alerts
US Class Meetings
-

Simms Reception Room
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts MS Cross Country - MS Cross Country ISL Champs (Away)
Subscribe to Alerts Varsity Soccer - ISL Quarterfinal (TBD)
Subscribe to Alerts MS Field Hockey B vs. St Stephen St Agnes (Away)
Subscribe to Alerts Varsity Volleyball - ISL Quarterfinal (TBD)
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts
US Fall Musical Rehearsal
-

James Whittier Lewis Theater
Subscribe to Alerts NCAP
-
Tue, Oct 31
Subscribe to Alerts
Halloween
Subscribe to Alerts Tuesday Blue
Subscribe to Alerts
College Visits
-

Simms Reception Room
Subscribe to Alerts
Halloween Parade
-
Subscribe to Alerts Varsity Field Hockey - ISL 1st round (TBD)
Subscribe to Alerts NCAP
-
Subscribe to Alerts Sea Devils
-
Wed, Nov 1
Subscribe to Alerts Wednesday Blue
Subscribe to Alerts
School Photo Make-up Day
-

Simms Reception Room
Subscribe to Alerts
Wednesday Late Start - 9:10 a.m.
Subscribe to Alerts
College Visits
-

Fathers Club Lounge
Subscribe to Alerts MS Volleyball A vs. Flint Hill School - MS (Home)
Subscribe to Alerts MS Soccer A vs. Flint Hill School - MS (Home)
Subscribe to Alerts MS Volleyball B vs. Flint Hill School - US (Away)
Subscribe to Alerts MS Volleyball C vs. Flint Hill School - US (Away)
Subscribe to Alerts MS Fall Tennis vs. Flint Hill School - MS (Away)
Subscribe to Alerts Varsity Soccer - ISL Semifinal (TBD)
Subscribe to Alerts Varsity Volleyball - ISL Semifinal (TBD)
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts
Common Threads AG Kick-Off Meeting
-

Simms Reception Room
Subscribe to Alerts
US Fall Musical Rehearsal
-

James Whittier Lewis Theater
Subscribe to Alerts NCAP
-
Thu, Nov 2
Subscribe to Alerts Thursday Blue
Subscribe to Alerts
LS Admissions Informational Coffee
-

Simms Reception Room
Subscribe to Alerts
New Gr.7 Students Lunch w/ Ryann
-

Simms Reception Room
Subscribe to Alerts MS Cross Country vs. Bullis (Away)
Subscribe to Alerts Varsity Field Hockey - ISL Quarterfinal (TBD)
Subscribe to Alerts Varsity Volleyball - ISL Championships @ GDS (Away)
Subscribe to Alerts Varsity Cross Country - MoCo Champs @ Covent Life (Away)
Covenant Life
Subscribe to Alerts NCAP
-
Subscribe to Alerts
US Fall Musical Rehearsal
-

James Whittier Lewis Theater
Subscribe to Alerts Sea Devils
-
Fri, Nov 3
Subscribe to Alerts Friday Blue
Subscribe to Alerts
New Gr.8 Students Lunch w/ Ryann
-

Simms Reception Room
Subscribe to Alerts MS Soccer B vs. Potomac (Home)
Subscribe to Alerts
Holton's Celebration of FotoWeek DC
-

James Whittier Lewis Theater Lobby
Subscribe to Alerts MS Fall Tennis vs. Potomac (Away)
Subscribe to Alerts MS Soccer A vs. Potomac (Away)
Subscribe to Alerts Varsity Soccer - ISL Championships @ Episcopal (TBD)
Subscribe to Alerts Varsity Field Hockey - ISL Semifinal (TBD)
Subscribe to Alerts NCAP
-
Subscribe to Alerts
US Fall Musical Tech Rehearsal
-

James Whittier Lewis Theater
Subscribe to Alerts Sea Devils
-
Sat, Nov 4
Subscribe to Alerts Sea Devils
-
Subscribe to Alerts
US Fall Musical Tech Rehearsal
-

James Whittier Lewis Theater
Subscribe to Alerts NCAP
-