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info@cis.ac.th

OFFICE TIME 8:00am- 4.00pm

Monday to Friday

School Calendar

December 2025

Mon Tue Wed Thu Fri Sat Sun
1
  • Y10-Y13 1st Mock exam
2
  • Y10-Y13 1st Mock exam
3
  • Y10-Y13 1st Mock exam
4
  • Y10-Y13 1st Mock exam
5
  • Y10-Y13 1st Mock exam
  • His Majesty the Late King's Birthday Holiday
6
  • Y10-Y13 1st Mock exam
7
  • Y10-Y13 1st Mock exam
8
  • Y10-Y13 1st Mock exam
9
  • Y10-Y13 1st Mock exam
10
  • Sports Day Practice
11
  • Sports Day Practice
12
  • Sports Day
13
  • Sports Day
14
15
  • In lieu of Constitution Day Holiday
16
  • Term Break
17
  • Term Break
18
  • Term Break
19
  • Term Break
20
  • Term Break
21
  • Term Break
22
  • Term Break
23
  • Term Break
24
  • Term Break
25
  • Term Break
26
  • Term Break
27
  • Term Break
28
  • Term Break
29
  • Term Break
30
  • Term Break
31
  • Term Break
  • New Year's Eve Holiday