A ruby jubilee marks a 40th anniversary.
Ruby jubilees in recent history
See also
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Hierarchy of precious substances
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List of longest-reigning monarchs
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List of current reigning monarchs by length of reign
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Wedding anniversary
A wedding anniversary is the anniversary of the date that a wedding took place. Couples often mark the occasion by celebrating their relationship, either privately or with a larger party. Special celebrations and gifts are often given for partic ...
References
{{jubilee
Jubilees