Tithi
Chaturdashi Meaning
Chaturdashi is the fourteenth lunar day. In panchang, tithi is calculated from the angular distance between the Sun and Moon, so its start and end time can vary by location.
In Simple Terms
Chaturdashi is the fourteenth lunar day. Its exact use depends on the wider panchang context: tithi, nakshatra, yoga, karana, vaara, and local sunrise.