That does not vary over time.

A particular period in the year.

Used attributively to describe various processes, devices, etc, that use the time an object or light takes to travel a certain distance. See Derived terms.

(economics) A measure of the preference a consumer has for immediate enjoyment rather than enjoyment at a future time.

(economics) Synonym of calendar spread

(of a value) calculated from selected discrete values over a specified time period

An agreed method of measuring time; a specification or standard of either the rate at which time passes, or of points in time, or of both.

The time when an airplane, etc, is scheduled to arrive.

The Christmas season / Yuletide / Christmastide

(of a circuit breaker) The time between the trip circuit energization and power arc interruption.