I think that the answer may be millenary!
milennium
milennium
It is called silver or silver year.
The prefix meaning "one thousandth" is milli-. For example, a thousandth of a metre is a millimetre. A thousandth of a gram is called a milligram.
Why is the 16th anniversary called tungsten
In the US it's called a cotton anniversary, and in the UK it's called a paper anniversary.
A 100th year Anniversary is CAlled a Cenntenial .
It is called the "opal" anniversary in the USA.
Tungsten anniversary
A 100th wedding anniversary is called a "diamond" anniversary.
one-thousandth
A 70th Anniversary is called a Platinum.
A 100th year Anniversary is CAlled a Cenntenial .