When Vishu

Vishu typically falls on the 14th or 15th of April each year. This is not arbitrary; it is strictly calculated based on the sidereal solar calendar used in Kerala. Vishu marks the first day of the 'Medam' month, which coincides with the sun's transition into the Aries (Mesha) zodiac sign.

This specific astronomical event, known as Mesha Sankranti, has been observed for millennia. It is a time when the sun is positioned directly above the equator, marking the Vernal Equinox. This alignment makes Vishu an incredibly important pivot point in the traditional astronomical year.