IUSD Calendar 2026-27: Winter Recess Dec. 21-Jan. 1, Last Day June 4

Irvine Unified School District (IUSD) in California has winter recess from Monday, Dec. 21, 2026 through Friday, Jan. 1, 2027 for both its traditional and year-round tracks, and the last day of school is Friday, June 4, 2027, according to its “District Calendar 2026-27” and the two instructional calendars linked from the district’s calendars page. Year-round students start nearly a month earlier, on Monday, July 20. Below are the two tracks side by side, every weekday traditional students are off, and a printable school-year calendar.

IUSD traditional and year-round calendars compared

The district lists “First Day for Traditional Students (PK-12)” on Tuesday, Aug. 18 and “First day for Year-Round Students” on Monday, July 20. “Last Day of School” is June 4 on the district calendar, and both instructional calendars mark June 4 as the end date.

	Traditional	Year-round
First day	Tue., Aug. 18, 2026	Mon., July 20, 2026
Fall break	None listed	Mon., Sept. 21 to Fri., Oct. 9, 2026
Thanksgiving holiday	Mon.-Fri., Nov. 23-27, 2026	Mon.-Fri., Nov. 23-27, 2026
Winter recess	Mon., Dec. 21, 2026 to Fri., Jan. 1, 2027	Mon., Dec. 21, 2026 to Fri., Jan. 1, 2027
Spring recess	Mon., March 29 to Fri., April 2, 2027	Mon., March 22 to Fri., April 2, 2027
Last day	Fri., June 4, 2027	Fri., June 4, 2027
Instructional days	180 for PK-8 and 180 for high school	180 for PK-8

The district does not say which schools are year-round. It lists a separate calendar for each track, so check your school before you plan around either start date. The footers on the three PDFs read “5/2025” and “5/20/2025,” and none prints a board approval date.

IUSD days off for traditional students in 2026-27

Traditional students start Aug. 18, after teacher workdays on Aug. 13 and 17 and a “Staff Development Day (PK-12)” on Friday, Aug. 14. From that start to June 4, the weekday count below adds every weekday the calendar lists as a holiday, recess or student holiday. Weekends are not counted, and Christmas and New Year’s Day fall inside winter recess.

Dates	Weekdays off	What the calendar calls it
Mon., Sept. 7, 2026	1	“Labor Day”
Mon., Oct. 12, 2026	1	“Staff Development Day/Student Holiday (PK-12)”
Wed., Nov. 11, 2026	1	“Veteran’s Day Observance”
Mon.-Fri., Nov. 23-27, 2026	5	“Thanksgiving Holiday”
Mon., Dec. 21, 2026 to Fri., Jan. 1, 2027	10	“Winter Recess”
Mon., Jan. 18, 2027	1	“Martin Luther King Jr. Day Observance”
Fri., Feb. 12, 2027	1	“Staff Development Day/Student Holiday (TK-12)”
Mon., Feb. 15, 2027	1	“President’s Day Observance (Washington)”
Mon., March 1, 2027	1	“Teacher/Student Holiday (PK-12)”
Mon.-Fri., March 29-April 2, 2027	5	“Spring Recess”
Mon., May 31, 2027	1	“Memorial Day Observance”
Total, all grades	28

Two more days depend on grade. High school students are off Friday, Jan. 15, 2027, listed as a “Teacher Work Day/Student Holiday (9-12)” for the traditional track only. The traditional grid also marks Thursday, Oct. 29, 2026 with an asterisk for “Floating Tchr Work Day PK-8.” That makes 29 weekdays off for high school and 29 for PK-8.

The count checks against the calendar’s own totals. There are 209 weekdays from Aug. 18 to June 4, and the traditional calendar lists 180 instructional days for PK-8 and 180 for high school, which leaves 29 for each.

Several of these days carry “Observance” on a “Classified Holidays” legend. The instructional grids treat them as non-instructional: Nov. 11, Jan. 18, Feb. 15 and May 31 are shaded as paid holidays and left out of each month’s instructional count. November, for example, counts 15 instructional days, which is 21 weekdays minus the Thanksgiving week and Nov. 11. Wednesday, Nov. 25 is “Lincoln’s Day (moved to this date),” and it falls inside Thanksgiving week, so it adds no extra day.

When is IUSD winter break 2026?

Winter recess is “First Day of Winter Recess – Year Round & Traditional” on Dec. 21, with Jan. 1 as the “Last Day of Winter Break.” That is 10 weekdays, Monday, Dec. 21 through Friday, Jan. 1, so the next school day for both tracks is Monday, Jan. 4. The calendar’s grid shows no class days between the two dates. Plan around it on the December 2026 calendar.

When is IUSD spring break 2027?

Traditional students have “First Day of Spring Recess - Traditional Students” on Monday, March 29, and “Last Day of Spring Recess” is Friday, April 2. Year-round students start a week earlier: “First Day of Spring Recess – Year Round” is Monday, March 22, with the same April 2 end, so their recess covers 10 weekdays and the traditional one covers five. Both tracks are back on Monday, April 5. See the weeks on the March 2027 calendar.

How many days off does the IUSD year-round track get?

Year-round students share the Thanksgiving, winter, Veterans Day, Martin Luther King Jr. Day, Presidents’ Day and Memorial Day dates above. They differ in four ways. Fall break adds 15 weekdays, Sept. 21 to Oct. 9. Spring recess adds five more weekdays than the traditional one. The Friday, Aug. 14 staff development day falls after their July 20 start, so they are off that day too. And Friday, Jan. 15 is a regular school day for them, because the “Teacher Work Day/Student Holiday (9-12)” line applies to the traditional track only.

That gives 49 weekdays off for year-round students at every grade, and 50 for PK-8 with the Oct. 29 floating day. The year-round calendar lists 180 instructional days for PK-8, and there are 230 weekdays from July 20 to June 4. Teacher workdays on Thursday and Friday, July 16-17, come before the first day.

IUSD four-day weekend in February and grading dates

“Staff Development Day/Student Holiday (TK-12)” on Friday, Feb. 12 and “President’s Day Observance (Washington)” on Monday, Feb. 15 give both tracks a four-day weekend, Feb. 12 to Feb. 15. Monday, March 1 is another student holiday two weeks later.

The calendars mark grading dates under “Semester/Trimester Dates.” Traditional high school lists “HS: Jan 14 (90/90),” and traditional PK-8 lists Nov. 13 (61 days) and March 5 (60 days). Year-round PK-8 lists Nov. 6 (61) and Feb. 26 (61). Neither the district calendar nor the instructional calendars list early release or minimum days. Nearby Orange County districts print their own dates: see the Santa Ana Unified calendar, the Capistrano Unified calendar and the Garden Grove Unified calendar. Districts can change dates, so check the district’s calendars page before booking travel. The district calendar also lists “Juneteenth” on Friday, June 18, after the last day.

Print the IUSD calendar

The free printable school-year calendar puts the traditional first and last days, Thanksgiving, winter and spring recess, and each student holiday on one page. The note under it gives the three year-round differences, and a fill-in area holds conferences and back-to-school night. Use the printable school-year calendar for your own planning.