Religions connected by Moon : Yom Kippur, also known as the Day of Atonement, is the holiest day of the year in Judaism. Its central themes are atonement and repentance. Jews traditionally observe this holy day with an approximate 25-hour period of fasting and prayer in synagogue. It is the 10th day of the 7th month ( Tishrei). Rosh Hashanah was the 1st day. On this day forgiveness of sins is also asked of God. At the end of Yom Kippur, one hopes that they have been forgiven by God.
In Hinduism and Jainism, Ekādaśī is considered a spiritual day and is usually observed by partial fast. The intent is again to ask for forgiveness from God.This period of abstinence starts from sunrise on the day of Ekādaśī to sunset on the following day.
The timing of each Ekādaśī and Yom Kippur is according to the position of the moon. Progression from a full moon to a new moon is divided into fifteen equal arcs. Each arc measures one lunar day, called a tithi. Ekādaśī refers to the 11th tithi, or lunar day.In the bright half of the lunar month, the moon will appear roughly 3/4 full on Ekādaśī, and in the dark half of the lunar month, the moon will be about 3/4 dark on Ekādaśī.
Alekhya Talapatra 