Definition - What does Dated Date mean?
Dated Date is the day when interest starts to accrue for a new issue of bonds.
Testopedia explains Dated Date
When a new issue of bonds is being offered for sale the issuer must determine the date when interest will start to be earned or start to accrue. The issuer will determine this date and set it as the dated date. It is quite possible that an investor may purchase a new issue of bonds and owe the issuer accrued interest if the bonds are not delivered by the dated date.