Top Definition
The month between Decemeber and January.
This month is very short.
Its only five days long.
Originally created to help the transition to the New Year,
Decuary is also in half years. for example if the year December 2013, or January 2014, its Decuary 2013.5.
Decuary is a comman month for births.
Its not on most calenders either
I was Born on Decuary 3rd, 1992
by mary434 October 25, 2009

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