Main Page | See live article | Alphabetical index In vedic timekeeping, a tithi (also spelled thithi) is a lunar day, or the time it takes for the longitudinal angle between the moon and the sun to increase by 12°. Tithis begin at varying times of day and vary in duration from approximately 19 to approximately 26 hours. There are 30 tithis in each lunar month, named as follows: Krsna paksa Gaura paksa (dark fortnight) (bright fortnight) 1 Pratipat 1 Pratipat 2 Dvitiya 2 Dvitiya 3 Trtiya 3 Trtiya 4 Caturthi 4 Caturthi 5 Pancami 5 Pancami 6 Sasti 6 Sasti 7 Saptami 7 Saptami 8 Astami 8 Astami 9 Navami 9 Navami 10 Dasami 10 Dasami 11 Ekadasi 11 Ekadasi 12 Dvadasi 12 Dvadasi 13 Trayodasi 13 Trayodasi 14 Caturdasi 14 Caturdasi 15 Amavasya (new moon) 15 Purnima (full moon) Ekadasi, the eleventh day of each lunar fortnight, has special religious significance in Hinduism and Jainism—usually observed by fasting. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.