Harvest Year, abbreviated as HY or H.Y., refers to the Santri calendar dating system. The calendar of Old Mesda is based on this system. Following the dissolution of Old Mesda, the Northern Territories continued to use this system.
It is generally accepted that HY0 was the first year that the harvest of grain, livestock and vegetables was sufficient to sustain the ancient Mesdan capital of Sasta for the winter.
The current year is HY754.