backdate
VerbWordNet 3.0
Verb (1)
- make effective from an earlier date“The increase in tax was backdated to January”
Webster's Dictionary (GCIDE)
backdate \back"date\ v. t.
1.to make effective from an earlier date; to make retroactive. The increase in tax was backdated to January.
Syn: back-date [WordNet 1.5]
2.to affix a date earlier than the present date; -- sometimes done for fraudulent purposes. Opposite of postdate.
Syn: back-date; predate; antedate. [PJC]
Note: Backdate is sometimes used incorrectly for postdate.