The
Tamil calendar is a
sidereal Hindu calendar used in
Tamil Nadu,
India. It is also used in
Puducherry, and by the
Tamil population in
Malaysia,
Singapore,
Mauritius and
Sri Lanka. Tamil Nadu farmers greatly refer to this. It is used today for cultural, religious and agricultural events, with the
Gregorian calendar largely used for official purposes both within and outside India. The Tamil calendar is based on the classical
Hindu solar calendar also used in
Assam,
West Bengal,
Kerala,
Manipur,
Nepal,
Odisha,
Rajasthan and
Punjab.