Look up the annual calendar of holidays of your school. How many of them pertain to different religions? what does this indicate?
Holidays in a school calendar for different religions:
Religions Holidays:
Hindu-Holi, Dussehra, Deepawali
Muslim-Id-ul-zoha, Id-ul-fitr, Muharram
Sikh-Lohri, Guru Gobind Singh Jayanti, Guru Parv
Christian-Christmas, Good Friday.
This indicates secular nature of India.