Govt of Tamilnadu defined the set rules and regulations for school education. School timings need to follow this standards and if not followed considered to be an violation.

Elementary and Middle Schools
1. Maximum working days per year: 220
2. School timings: 9.30 am to 4.30 pm

Higher Secondary Schools

1. Maximum working days per year: 200
2. School timings: 8.30 am to 5.00 pm(Urban) or 9.00 to 5.30 (Rural)