misdate

[mis-deyt]

verb (used with object), mis·dat·ed, mis·dat·ing.

to assign or affix a wrong date to.

noun

a wrong date.

Origin of misdate

First recorded in 1580–90; mis-1 + date1
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British Dictionary definitions for misdate

misdate

verb

(tr) to date (a letter, event, etc) wrongly
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for misdate
v.

1580s, from mis- (1) + date (v.1). Related: Misdated; misdating.

Online Etymology Dictionary, © 2010 Douglas Harper