To give an earlier date to
date back, predate, backdate, anachronize, misdate, date before
the true date, date earlier than the fact, transfer to an
earlier date, accelerate, cause to happen sooner.
To precede in time
come before, precede, antecede; see precede.
"antedate." YourDictionary, n.d. Web. 18 August 2018. <http://thesaurus.yourdictionary.com/antedate>.
antedate. (n.d.). Retrieved August 18th, 2018, from http://thesaurus.yourdictionary.com/antedate
To come, exist, or occur before in time: