The date on which a pregnant woman is expected to give birth. / The date of payment in financial arrangements. / The date by which a book (or other item) borrowed from a library must be returned.

plural of call date

The final date on which a perishable product can be legally sold to the public. / (idiomatic, by extension) Used to indicate that something, or someone, is old and out of date.

(uncountable) A method of determining the age of a fossil by comparing its placement with that of fossils in other layers of rock. / (countable) An act of so doing.

Synonym of radioactive dating

The process of determining the age of a material by estimating the amount of radioactive decay of one or more radioisotopes present in the material when it was formed.

(management, accounting) Relating to the period from the beginning of a fiscal year to the end of a reporting period.

(physics, archaeology, paleontology) A method of estimating the age of an artifact or biological vestige based on the relative amounts of the different isotopes of carbon present in a sample.

Alternative spelling of double date

(before the noun, idiomatic) Current; recent; the latest. / (idiomatic) Informed about the latest news or developments; abreast.