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Calendar & School Hours


The academic year is 180 days, broken into two semesters. Semester 1 is from early August until late December. Semester 2 is from early January to early June. Lao National holidays are observed in addition to traditional international school breaks.

Key events are highlighted on this active calendar and on the official VIS printed wall calendar distributed to families at the start of the school year.

Calendar Abbreviations






PLD   Professional Learning Day
CCP   Co-curricular Program
IB   International Baccalaureate
UOI   Unit of Inquiry
MRISA   Mekong River International Schools Association


School Hours

Primary School (EY - Grade 5)
  • Monday, Tuesday, Thursday, Friday

7:50 a.m. – 3:00 p.m.

  • Wednesday

7:50 a.m. – 1:00 p.m.

Secondary School (Grade 6 - 12)
  • Monday, Tuesday, Thursday, Friday

8:45 a.m. – 4:00 p.m.

  • Wednesday

8:45 a.m. – 2:00 p.m.