Public schools usually sing the National Anthem at 08:30, which indicates the start of the school day. Classes usually end around 15:30. International schools may have different schedules; this depends on the school.
Public schools usually have one month of holiday in October and two months of holiday in March and April.
Private international schools tend to have different holiday schedules. They are more likely to follow the Western schedule and have long holidays in July and August and a two week holiday for both Christmas and Easter.