Mahadwadasi holds significance within the Vaishnava
tradition and among those who observe Ekadasi fasting. In this practice, if the
majority of the fasting for Ekadasi is observed on the Dwadasi day (the 12th
day), rather than the traditional Ekadasi (the 11th day), it is referred to as
Mahadwadasi.
During Mahadwadasi, fasting begins on Ekadasi and extends
through Dwadasi, concluding on the 13th day (trayodasi tithi). This observance
underscores a particular dedication to spiritual discipline and austerity
within the lunar calendar.
Although Mahadwadasi recurs a few times throughout the Hindu
lunar calendar, its significance primarily lies in the adherence to this unique
fasting pattern. There are no additional specific rituals or celebrations
associated with this day beyond its role in the Ekadasi observance.