A ruby jubilee marks a 40th anniversary.
Ruby jubilees in recent history
See also
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Hierarchy of precious substances
In popular culture, sets of precious substances may form hierarchies which express conventional perceived relative value or merit. Precious metals appear prominently in such hierarchies, but as they grow, gems and semi-precious materials may be in ...
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List of longest-reigning monarchs
This is a list of the longest-reigning monarchs of all time, detailing the monarchs and lifelong leaders who have reigned the longest in world history, ranked by length of reign.
Monarchs of sovereign states with verifiable reigns by exact d ...
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Wedding anniversary
A wedding anniversary is the anniversary of the date a wedding took place. Couples may take the occasion to celebrate their relationship, either privately or with a larger party. Special celebrations and gifts are often given for particular an ...
References
{{jubilee
Anniversaries