Learn the Hindu calendar

Panchang is the Hindu almanac describing each day through five limbs — Tithi, Nakshatra, Yoga, Karana and Vaara — computed from the Sun and Moon.

A tithi is a lunar day — the time the Moon takes to move 12° ahead of the Sun. 30 tithis make a lunar month, split into Shukla and Krishna paksha.

A nakshatra is one of 27 lunar mansions — 13°20′ segments of the zodiac. The nakshatra of the day is the one the Moon occupies, used for naming and muhurta.

Rahu Kaal is a roughly 90-minute inauspicious period each day, one-eighth of the daytime, whose slot depends on the weekday. New ventures are avoided during it.

Choghadiya divides day and night into eight parts each (~90 minutes), labelled auspicious (Amrit, Shubh, Labh) or inauspicious (Rog, Kaal, Udveg) by their ruling planet.

A muhurat is an auspicious time window chosen for an activity by combining the panchang limbs — tithi, nakshatra, vaara, yoga and karana — into favourable yogas.