Instructional calendars are approved by the Board of Education in the spring prior to the beginning of the next school year. Jefferson School District attempts to closely align the instructional calendar with Tracy Unified School District, as many of our families have students in both districts.
The table below provides an accessible summary of the 2025–2026 instructional calendar.
2025–2026 instructional calendar summary by month
Month
Instructional School Days
Notes
August
20
Students first day: August 4. Minimum day, 1:30 p.m. release: August 4, 11, 18, and 25.
September
20
Holiday: September 1. Minimum day, 1:30 p.m. release: September 8, 15, and 29. Minimum day, 2:00 p.m. release: September 22–26.
October
18
Holiday break: October 6–10. Minimum day, 1:30 p.m. release: October 13, 20, and 27.
November
14
Minimum day, 1:30 p.m. release: November 3, 10, and 17. Holiday: November 11. Thanksgiving break: November 24–28. First trimester ends: November 7.
December
14
Professional development day, no students: December 1. Minimum day, 1:30 p.m. release: December 8 and 15. Winter break begins December 22.
January
19
Winter break continues January 1–2. Holiday: January 19. Minimum day, 1:30 p.m. release: January 5, 12, and 26.
February
18
Holidays: February 9 and 16. Minimum day, 1:30 p.m. release: February 2 and 23. Second trimester ends: February 27.
March
17
Spring break: March 9–13. Minimum day, 1:30 p.m. release: March 2, 16, 23, and 30.
April
21
Holiday: April 3. Minimum day, 1:30 p.m. release: April 6, 13, 20, and 27.
May
19
Minimum day, 1:30 p.m. release: May 4, 11, and 18. Holiday: May 25. Students last day and third trimester ends: May 28. Teacher last day, half day: May 29.
The table below provides an accessible summary of the 2026–2027 instructional calendar.
2026–2027 instructional calendar summary by month
Month
Instructional School Days
Notes
August
20
Students first day: August 3. Minimum day, 1:30 p.m. release: August 3, 10, 17, 24, and 31.
September
20
Holiday: September 7. P/T Conference, no students: September 21. Minimum day, 2:00 p.m. release: September 22–25. Minimum day, 1:30 p.m. release: September 28.
October
17
Minimum day, 2:00 p.m. release: October 2. Fall break: October 5–9. Minimum day, 1:30 p.m. release: October 12, 19, and 26.
November
15
First trimester ends: November 6. Minimum day, 1:30 p.m. release: November 9, 16, and 30. Holiday: November 11. Minimum day, 2:00 p.m. release: November 20. Thanksgiving break: November 23–27.
December
14
Minimum day, 1:30 p.m. release: December 7 and 14. Minimum day, 2:00 p.m. release: December 18. Winter break begins December 21.
January
19
Winter break continues January 1. Minimum day, 1:30 p.m. release: January 4, 11, and 25. Holiday: January 18.
February
18
Minimum day, 1:30 p.m. release: February 1 and 22. Holidays: February 8 and 15. Second trimester ends: February 26.
March
16
Minimum day, 1:30 p.m. release: March 1, 15, and 22. Minimum day, 2:00 p.m. release: March 5. Spring break: March 8–12. Holiday: March 29.
April
22
Minimum day, 1:30 p.m. release: April 5, 12, 19, and 26.
May
19
Minimum day, 1:30 p.m. release: May 3, 10, and 17. Students last day: May 27. Teacher last day, half day: May 28. Holiday: May 31.
