School Calendar
Academic Calendar 2025/2026
2025
August
18: Start of Term 1 / Orientation
19: Orientation Day 2
20: Orientation Day 3 / Camp-prep
21: Sleep over
22: Half Day
September
2: Start ECA / CCA (TBC)
4: Thai Teachers Day-Wan Kru Day
23-16: In formal PTC
October
3: International Teacher Day Celebration
4: Chiang Mai -International School Gateway
6: Mid-Autumn Festival
11-19: Mid-Term Break
23: Chulalongkorn Memorial Day
31: Halloween
November
5: Loy Krathong
10-14: Anti – Bully Week
14: Field Trip
13: World kindness day
December
1-3: Assessment Week (CA 1)
4: Marking Day
10: Constitution
11: Big Cleaning
12: End of Term 1 / Sport day
13: Christmas Party for student
PTC / Report Card Day / Christmas Party for staff
14 Dec-6 Jan: Winter Holiday / School Break
2026
January
7: Start of Term 2
9: Children’s Day
28: International Day
February
6: Waitangi Day (New Zealand’s national day)
13: Chinese New Year
9-13: Chinese Language Week
14-1: Chinese New Year Break
27: Field Trip
March
5: World Book Day
9-13: Math week
24-26 : Assessment Week (CA 2)
27: Marking Day
31: Hari Raya Malay Singapore day
April
2: End of Term 2 / Good Friday
4: PTC / Report Card Day
4-19: Songkran Break
13-15 :Public Holiday
20: Start of Term 3
23: St.George’s Day (England National Day)
29: International Dance Day
May
5: Funfair Day
14: Musical Prep.
15: Musical
29: Samoa’s National Day (1 June)
June
5: World Environment Day
6: Sweden National’s Day
12: Music Fest ASIS
22-24: Assment Week (SA)
25: Marking Day
26: Sunthorn Phu Day (Thai Language Day)
30: International Friendship Day
July
3: Graduation / End of Term 3
4: PTC / Report Card Day
* Please note that the calendar is subject to change