Herndon High | Upcoming Events | Date & Time |
| Holidays (Winter Break) | Mon 12/22/2025 (All Day) to Fri 01/02/2026 (All Day) |
| Scholastic Bowl: - vs TBA | Tue 01/06/2026 12:00 am - 11:59 pm |
| Holiday (Martin Luther King, Jr’s Birthday) | Mon 01/19/2026 (All Day) |
| Theatre Winter: - vs TBA | Tue 01/20/2026 12:00 am - 11:59 pm |
| End of Second Quarter - Two-Hour Early Release | Wed 01/28/2026 (All Day) |
| Student Holiday (Staff Development Day) | Thu 01/29/2026 (All Day) |
| Student Holiday (Teacher Workday) | Fri 01/30/2026 (All Day) |
| Lacrosse: Girls Varsity at Stafford | Mon 02/02/2026 2:00 pm - TBD |
| Tennis: Boys Varsity at TBA | Mon 02/02/2026 4:00 pm - TBD |
| Tennis: Girls Varsity at TBA | Mon 02/02/2026 4:00 pm - TBD |
| Lacrosse: Boys JV at Dominion | Mon 02/02/2026 5:00 pm - TBD |
| Lacrosse: Girls JV at South Carroll | Mon 02/02/2026 5:00 pm - TBD |
| Soccer: Boys JV at TBA | Mon 02/02/2026 5:00 pm - TBD |
| Baseball: JV at Stratford | Mon 02/02/2026 6:00 pm - TBD |
| Baseball: Varsity at South Carroll | Mon 02/02/2026 6:00 pm - TBD |
| Lacrosse: Boys Varsity at Stratford | Mon 02/02/2026 6:00 pm - TBD |
| Softball: Varsity at TBA | Mon 02/02/2026 6:00 pm - TBD |
| Track and Field: Boys Varsity at TBA | Mon 02/02/2026 6:00 pm - TBD |
| Track and Field: Girls Varsity at TBA | Mon 02/02/2026 6:00 pm - TBD |
| Soccer: Boys Varsity at TBA | Mon 02/02/2026 7:00 pm - TBD |
| Soccer: Girls JV at TBA | Mon 02/02/2026 7:00 pm - TBD |
| Soccer: Girls Varsity at TBA | Mon 02/02/2026 7:00 pm - TBD |
| Holiday (Washington’s Birthday and Presidents’ Day) | Mon 02/16/2026 (All Day) |
| Student Holiday (Teacher Work Day) | Tue 02/17/2026 (All Day) |
| Softball: JV vs TBA | Tue 03/03/2026 12:00 am - 11:59 pm |
| Theatre Spring: - vs TBA | Tue 03/03/2026 12:00 am - 11:59 pm |
| Holiday (Eid al-Fitr) | Fri 03/20/2026 (All Day) |
| End of Third Quarter - Two-Hour Early Release | Fri 03/27/2026 (All Day) |
| Spring Break (Holiday) | Mon 03/30/2026 (All Day) to Fri 04/03/2026 (All Day) |
| Student Holiday (Teacher Workday) | Mon 04/06/2026 (All Day) |
| Student Holiday (School Planning Day) | Fri 04/10/2026 (All Day) |
| Cinderella | Fri 05/01/2026 7:00 pm - 10:00 pm |
| Cinderella | Sat 05/02/2026 2:00 pm - 5:00 pm |
| Cinderella | Sat 05/02/2026 7:00 pm - 10:00 pm |
| Cinderella | Sun 05/03/2026 2:00 pm - 5:00 pm |
| Holiday (Memorial Day) | Mon 05/25/2026 (All Day) |
| Student Holiday (Teacher Workday) | Tue 05/26/2026 (All Day) |
| Holiday (Eid Al-Adha) | Wed 05/27/2026 (All Day) |
| Last Day of School (Early Release) | Wed 06/17/2026 (All Day) |
| Labor Day | Mon 09/07/2026 (All Day) |
| Columbus Day | Mon 10/12/2026 (All Day) |
| Halloween | Sat 10/31/2026 (All Day) |
| Daylight Saving Time Ends | Sun 11/01/2026 (All Day) |
| Veterans Day | Wed 11/11/2026 (All Day) |
| Thanksgiving | Thu 11/26/2026 (All Day) |
| Christmas Day | Fri 12/25/2026 (All Day) |
| New Year's Day | Fri 01/01/2027 (All Day) |
| Martin Luther King Day | Mon 01/18/2027 (All Day) |
| Valentine's Day | Sun 02/14/2027 (All Day) |
| Presidents' Day | Mon 02/15/2027 (All Day) |
| Daylight Saving Time Begins | Sun 03/14/2027 (All Day) |
| St. Patrick's Day | Wed 03/17/2027 (All Day) |
| Easter | Sun 03/28/2027 (All Day) |
| Cinco De Mayo | Wed 05/05/2027 (All Day) |
| Memorial Day | Mon 05/31/2027 (All Day) |
| Independence Day | Sun 07/04/2027 (All Day) |
Tandem
