CMISSchool Master Calendars
Printable Calendars: 2026-27
2025-2026 School Year
First Semester
Month |
Date |
Day |
Event |
|---|---|---|---|
| July | 28 | Monday | King Vajiralongkorn’s Birthday Holiday |
| July | 29-31 | Tue-Thu | New Teachers In-service |
| August | 4-6 | Mon-Wed | Full School Orientation |
| August | 7 | Thursday | First Day of School Year |
| August | 12 | Tuesday | Mother's Day (No School) |
| September | 17 | Wednesday | Teacher PD Day (Early Dismissal 11:00 AM) |
| October | 2 | Thursday | Early Dismissal (11:00 AM) PST Conference ES/MS (12:00-15:00 PM) |
| October | 3 | Friday | PST Conference HS (08:00 AM-15:00 PM) (No School) |
| October | 13-17 | Mon-Fri | October Break |
| October | 23 | Thursday | King Chulalong Korn Day (No School) |
| November | 19 | Wednesday | Teacher PD Day (Early Dismissal 1:30 PM) |
| December | 5 | Friday | Father's Day (No School) |
| December | 12 | Friday | Last Day of 1st Semester - Early Dismissal (11:00 AM) |
| December | 15-31 | Christmas Break (No School) |
Second Semester
Month |
Date |
Day |
Event |
|---|---|---|---|
| January | 1-2 | Christmas Break | |
| January | 5 | Monday | Teacher PD Day |
| January | 6 | Tuesday | First Day of Second Semester |
| January | 21 | Wednesday | Wai Kru Day (Early Dismissal 11:00 AM) |
| February | 18 | Wednesday | Teacher PD Day (Early Dismissal 1:30 PM) |
| February | 26 | Thursday | Early Dismissal (11:00 AM) PST Conference ES/MS (12:00-15:00 PM) |
| February | 27 | Friday | PST Conference HS (8:00 AM - 15:00 PM - No School) |
| March | 2 | Monday | Teacher PD Day |
| March | 3 | Tuesday | Makha Bucha Day (No School) |
| March | 18 | Wednesday | Teacher PD Day (Early Dismissal 1:30 PM) |
| March | 26 | Thursday | Teacher Planning Day (No School) |
| April | 6-17 | April Break (No School) | |
| May | 1 | Friday | Thai Labor Day (No School) |
| May | 4 | Monday | Royal Coronation Ceremony Day (No School) |
| June | 1 | Monday | Substitute for Visakha Bucha Day (No School) |
| June | 3 | Wednesday | Queen's Birthday (No School) |
| June | 12 | Friday | Last Day of School - Early dismissal (11:00 AM) |
2026-2027 School Year
First Semester
Month |
Date |
Day |
Event |
|---|---|---|---|
| July | 31 | Friday | Admin return |
| August | 3-6 | Mon-Thu | New Teachers In-service |
| August | 7-11 | Mon-Wed | Full School Orientation |
| August | 12 | Wednesday | Mother's Day (No School) |
| August | 13 | Thursday | First Day of School Year |
| September | 16 | Wednesday | Teacher PD Day (Early Dismissal 13:30 PM) |
| October | 1 | Thursday | Early Dismissal (11:00 AM) PST Conference ES/MS (12:00-15:00 PM) |
| October | 2 | Friday | PST Conference HS (08:00 AM-15:00 PM) (No School) |
| October | 13 | Tuesday | Navamindra Maharaj Day (No School) |
| October | 19-23 | Mon-Fri | October Break |
| November | 18 | Wednesday | Teacher PD Day (Early Dismissal 1:30 PM) |
| December | 7 | Monday | Father's Day (observed) (No School) |
| December | 18 | Friday | Last Day of 1st Semester - Early Dismissal (11:00 AM) |
| December | 19-31 | Christmas Break (No School) |
Second Semester
Month |
Date |
Day |
Event |
|---|---|---|---|
| January | 1-8 | Christmas Break | |
| January | 11 | Monday | Teacher PD Day |
| January | 12 | Tuesday | First Day of Second Semester |
| January | 15 | Friday | Wai Kru Day (Early Dismissal 11:00 AM) |
| January | 20 | Wednesday | Teacher PD Day (Early Dismissal 1:30 PM) |
| February | 22-26 | Mon-Fri | February Break |
| March | 5 | Friday | CMCIS PD Day (No School) |
| March | 17 | Wednesday | Teacher PD Day (Early Dismissal 1:30 PM) |
| March | 26 | Friday | Good Friday |
| April | 5-16 | Songkran/ April Break (No School) | |
| May | 4 | Tuesday | Royal Coronation Ceremony Day (No School) |
| May | 20 | Thursday | Visakha Bucha Day (No School) |
| June | 3 | Thursday | Queen's Birthday (No School) |
| June | 18 | Friday | Last Day of School - Early dismissal (11:00 AM) |