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

OCTOBER 2025

  • Thursday, 30th: OSA Halloween!

NOVEMBER 2025

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

DECEMBER

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