Jurģis arose from a merger of ancient Latvian deity Ūsiņš and Saint George due to the influence of Christianity. Ūsiņš, too, is a patron of horses and riders. In the 19th century, after the abolishment of serfdom, Jurģi, ancient Ūsiņš' Day, usually was a termination date for contracts. https://en.wikipedia.org/wiki/Jur%C4%A3i
In the 19th century, after the abolishment of serfdom, Jurģi, ancient Ūsiņš' Day, usually was a termination date for contracts.
https://en.wikipedia.org/wiki/Jur%C4%A3i