Mark Your Calendars!

2025-2026 Calendar of Sessions & Breaks

Sessions & Breaks At A Glance

2025-2026 Calendar of Sessions & Breaks
  • Session 1, 2025: 7 weeks, Aug. 25 – Oct. 10
    • No OSA classes on Monday, Sept. 1
    • Session break, no OSA classes: Oct. 13 – 17
  • Session 2, 2025: 8 weeks, Oct. 20 – Dec. 19
    • No OSA classes on Tuesday, November 11
    • Mid-session break, no OSA classes Nov. 24-28
    • Winter break, no classes: Dec. 22 – Jan. 9
  • Session 3, 2026: 9 weeks, Jan. 12 – March 20
    • No OSA classes on Monday, Jan. 19
    • Mid-session break Friday, Feb. 13 through Friday, Feb. 20
  • Session 4, 2026: 8 weeks, March 23 – May 29
    • Mid-session break (Spring Break), April 6-17
    • Outdoor adventure with NatureBridge April 13-17
    • No OSA classes on Monday, May 25
  • Imaginession 2026: June 1-3
  • Summer Session 2026: TBD

Upcoming Dates to Remember

Please check back frequently as this page is updated regularly.

The session schedule for One Spark Academy (a “Learning Center”) follows the calendar for the local district, CVUSD. Classes for OSA are closed on national or observed legal holidays, not necessarily religious holidays.

A PDF of the 2025-2026 Calendar of Sessions & Breaks is here: OSA Calendar 2025-2026

NOVEMBER 2025

  • Wednesday, 12th: OSA Parent Tech Talk, 5:00-6:45
  • Monday, 17th: OSA Giving Campaign starts, through 1/5/26
  • 17th-20th: Adelante Food Drive (collection)
  • Friday, 21st: Giving Thanks Feast, 1:00-3:00
  • 24th-28th: OSA Mid-Session Break; No OSA classes

DECEMBER

  • Wednesday, 3rd: Session 3 Pre-Registration
  • Wednesday, 3rd: Parent Talk for Body Talk, 7:00-8:30 PM
  • Monday, 15th: Secret Elves Gift Exchange starts
  • Friday, 19th: Session 2 ends
  • 22nd- 1/9/26: Winter Break; No OSA classes

JANUARY

  • Monday, 5th: OSA Giving Campaign closes!
  • Monday, 12th: Session 3 begins (9 weeks, 1/12-3/20)
  • Monday 19th: MLK, Jr. Holiday (No OSA classes)
  • Thursday, 22nd: Yosemite Parent Info Night
  • Thursday, 29th: Alternative High School Night 6:15-8:00

FEBRUARY

  • OSA Tours, dates TBD
  • OSA Parent Tech Talk #2, date TBD (maybe Zoom?)
  • 9th-12th: Friendship Week
  • Friday, 13th: Presidents’ Day holiday (No OSA classes)
  • 16th-20th: Mid-Session Break
  • Wednesday, 25th: Pre-Registration Session 4
  • Friday, 27th: Dinner & Drum Circle 5:30-7:45

MARCH

  • OSA Tours, dates TBD
  • Yearbooks on sale
  • Thursday, 19th: Women in History Night, 6:00-8:00 PM
  • Friday, 20th: Astronomy Night (weather permitting)
  • Friday, 20th: Session 3 ends
  • Monday, 23rd: Session 4 begins (8 weeks, 3/23-5/29)
  • Monday, 30th: Pre-Registration for 2026-2027 opens for CURRENT families

APRIL

  • OSA Talent Show, date TBD
  • 6th-17th: OSA Spring Break
  • 13th-17th: Outdoor Adventure in Yosemite
  • Monday, 27th: Pre-Registration for 2026-2027 begins for NEW students

MAY

  • Saturday, 2nd: Ignite a Spark Fundraiser at Art Trek! 6:00-9:00 PM
  • Int Guitar Class concert/ jam date TBD
  • Monday, 4th: Imaginession Registration
  • Monday, 25th: Memorial Day (No OSA classes)
  • Thursday, 28th: Shakespeare Play! 4:00 PM
  • Friday, 29th: Session 4 ends

JUNE

  • 1st-3rd: Imaginession!
  • Thursday, 4th: OSA Launch for 8th grade
  • Wednesday, 10th: Fall Parent Information Night, in person 7:00-8:30 PM
  • Thursday, 11th: Fall Parent Information Night via Zoom (7:00-8:00)