UNIS Calendar 2026-2027: Important Dates and Schedules

UNIS Calendar 2026-2027 details are now available for students, families, and faculty planning for the upcoming academic year. The United Nations International School (UNIS) operates on a traditional two-semester system comprising approximately 36 weeks of academic instruction (totaling around 177 instructional days and 186 teacher contract days).

Fall semester launches in early September 2026 and runs through January 2027, featuring key pauses including an October fall break, national holidays, and a multi-week winter vacation.

Spring semester commences in January 2027 and concludes in mid-June 2027, incorporating regional observances such as the Lunar New Year (Tet) holiday, spring break, and professional development days.

For high school students pursuing the International Baccalaureate (IB) Diploma or UNIS High School Diploma, academic progress is measured per semester, requiring a total of 22.5 credits across core subjects to fulfill graduation requirements.

On this page, you will find a complete breakdown of official start and end dates, key holidays, examination schedules, and parent-teacher conference periods for the entire United Nations International School 2026–2027 school year.

UNIS Calendar Fall 2026

1. School leadership and administrators return on Monday, August 17, 2026.
2. Psychologists return on Tuesday, August 18, 2026.
3. New Faculty Orientation takes place from Wednesday, August 19, 2026, through Monday, August 24, 2026.
4. Team leaders and coordinators return on Thursday, August 20, 2026.
5. Counselors return on Friday, August 21, 2026.
6. All faculty return on Tuesday, August 25, 2026.
7. Faculty Preparation Day takes place on Tuesday, September 1, 2026, and no meetings are scheduled.
8. UNIS’s first day of classes is Wednesday, September 2, 2026. It is the first day of school for United Nations International School students.
9. Students attend a half-day schedule on Friday, September 4, 2026.
10. Labor Day is observed on Monday, September 7, 2026, and the school is closed.
11. Rosh Hashanah is observed from Friday, September 11, 2026, through Sunday, September 13, 2026.
12. Yom Kippur is observed on Sunday, September 20, 2026.
13. International Day of Peace is observed on Sunday, September 20, 2026.
14. Columbus Day and Indigenous Peoples’ Day are observed on Monday, October 12, 2026.
15. UN Day Celebrations take place on Friday, October 16, 2026.
16. Faculty Professional Development Days take place from Monday, October 19, 2026, through Tuesday, October 20, 2026, and no classes are held.
17. UNIS Fall Break 2026 takes place from Wednesday, October 21, 2026, through Thursday, October 22, 2026, and no classes are held.
18. The school is closed in observance of UN Day on Friday, October 23, 2026.
19. Diwali is observed on Sunday, November 8, 2026.
20. Veterans Day is observed on Wednesday, November 11, 2026.
21. Afternoon parent conferences take place on Wednesday, November 11, 2026.
22. Parent conferences take place from Thursday, November 12, 2026, through Friday, November 13, 2026, and no classes are held.
23. UNIS Thanksgiving Break Weekend takes place from Wednesday, November 25, 2026, through Friday, November 27, 2026, and the school is closed.
24. Hanukkah is observed from Friday, December 4, 2026, through Saturday, December 12, 2026.
25. UNIS Winter Break 2026 takes place from Monday, December 21, 2026, through Friday, January 1, 2027, and no classes are held.
26. Christmas Day is observed on Friday, December 25, 2026, and the school is closed.
27. New Year’s Day is observed on Friday, January 1, 2027, and the school is closed.
28. School resumes on Monday, January 4, 2027.
29. Dr. Martin Luther King Jr. Day is observed on Monday, January 18, 2027, and the school is closed.
30. The last day of the Fall 2026 semester is Friday, January 22, 2027.

UNIS Calendar Spring 2027

1. The first day of the Spring 2027 semester is Monday, January 25, 2027.
2. Lunar New Year is observed on Saturday, February 6, 2027.
3. Ramadan begins on Sunday, February 7, 2027.
4. Mardi Gras is observed on Tuesday, February 9, 2027.
5. Presidents’ Day is observed on Monday, February 15, 2027, and the school is closed. Presidents’ Week takes place from Tuesday, February 16, 2027, through Friday, February 19, 2027, and no classes are held.
6. Eid al-Fitr is observed on Tuesday, March 9, 2027.
7. Afternoon Junior School and Middle School parent conferences take place on Wednesday, March 24, 2027.
8. Junior School and Middle School parent conferences take place from Thursday, March 25, 2027, through Friday, March 26, 2027, and no classes are held.
9. Easter 2027 is observed on Sunday, March 28, 2027.
10. UNIS Spring Break 2027 takes place from Monday, March 29, 2027, through Friday, April 9, 2027, and no classes are held. Classes resume on Monday, April 12, 2027.
11. Passover is observed from Wednesday, April 21, 2027, through Thursday, April 29, 2027.
12. Memorial Day Weekend begins on Friday, May 28, 2027, and the school is closed. Memorial Day is observed on Monday, May 31, 2027, and the school is closed.
13. T4 Graduation takes place on Friday, June 4, 2027, and students attend a half-day schedule.
14. The last day of classes is Wednesday, June 16, 2027.
15. M4 Commencement takes place on Thursday, June 17, 2027.
16. Juneteenth is observed on Friday, June 18, 2027, and the school is closed.
17. Independence Day is observed on Friday, July 2, 2027, and the school is closed.

For more on the UNIS Calendar 2026-2027, visit the United Nations International School academic calendar website.