Wikipedia
Gaurabda
Vaishnava calendar
Gaurabda is the name of the moon calendar used by Gaudiya Vaishnavism as part of the liturgy.
It is used as the main calendar of the International Society for Krishna Consciousness.
Following Gaudiya Vaisnava tradition, the years are counted from the birth (traditionally known as the "appearance" day) of Lord Caitanya Mahaprabhu. Lord Caitanya, widely recognized as the incarnation of Krishna, is also known as Gaura, so the year is called "Gaurabda," or "the year of Lord Caitanya."