Ekadashi (called "Agiyaras" in Gujarati) is the 11th lunar day (tithi) of each lunar month. It occurs twice monthly — once during Shukla Paksha (waxing moon) and once during Krishna Paksha (waning moon). There are 24 Ekadashis in a year (sometimes 26 in a leap year).
Ekadashi is dedicated to Lord Vishnu and is considered the holiest day for fasting and devotion. In the Vaishnava tradition, observing every Ekadashi fast is of great significance.
In Gujarati, Ekadashi is called "Agiyaras" — from "Agiyaar" (eleven) + "ras" (day). This dialect form is universal in Gujarat. Two days before each Agiyaras comes "Nom" (9th tithi), and one day after is "Baras" (12th tithi).
Avoid:
Allowed: