Ruby jubilee

A ruby jubilee marks a 40th anniversary.

Ruby jubilees in recent history

See also

• Hierarchy of precious substances
• List of longest-reigning monarchs
• List of current reigning monarchs by length of reign
• Wedding anniversary

References

1. "Spain Medal Homage Royal Family Crown 1925 Spanish Decoration - Dracomedals Medals-Orders Medals Orders Decorations". www.medals-orders.com. Archived from the original on 2016-10-30.
2. พระเจ้าอยู่หัวในพระบรมโกศ กษัตริย์พระองค์เดียวในโลกที่ได้รับการเฉลิมฉลอง [Platinum Jubilee].
3. "Queen marks Ruby Jubilee". Times Daily. Vol. 124, no. 154. June 3, 1993. p. 1.
4. Queen Margrethe celebrates 40 years on Danish throne
5. "Queen Margrethe II of Denmark marks 40 years on the throne". BBC News. Denmark. 12 January 2012.
6. "The King: 40 years as Sweden's Head of State - Sveriges Kungahus".