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What is a Muhurta?
A muhurta is, first of all, a unit of time: one-thirtieth of a day, about 48 minutes. Fifteen muhurtas make up the daytime and fifteen the night, each with its own name and character.
The word has come to mean an auspicious time: the moment chosen to begin something important so that it starts under favourable conditions. Choosing one is an old branch of Jyotisha, called Muhurta Shastra or electional astrology, and it is why weddings in India are often held at very precise times, sometimes late at night.
The idea is simple: as a birth chart describes a person, the sky at the start of an undertaking colours the undertaking. A good muhurta is chosen for a purpose, a place and the people involved.