Denmark’s Queen Margrethe signs historic abdication, making son Frederik X king (Global News)

Margrethe, at 83, is the first Danish monarch to voluntarily relinquish the throne in nearly 900 years.

This leaves Denmark with two queens: Margrethe will keep her title while Frederick’s Australian-born wife will become Queen Mary. Even the prime minister was unaware of her intentions right until her announcement on New Year’s Eve; Margrethe cited health issues.