United States – St Piran's day is also celebrated annually in Grass Valley, California, United States, to honour the Cornish miners who participated in the area's mining history beginning in the mid 19th century.
In the United States, St Piran's day is observed every year in Grass Valley, California, as a tribute to the Cornish miners who contributed to the area's rich mining history, which began in the mid-1800s.