Tempus fugit augebitur scientia on a sundial in Redu, Belgium
Tempus fugit is a Latin expression meaning "time flees", more commonly translated as "time flies". It is frequently used as an inscription on clocks. The expression was first recorded in the poem Georgics written by Roman poet Virgil: Sed fugit interea, fugit irreparabile tempus, singula dum capti circumvectamur amore, which means, "But meanwhile it flees: time flees irretrievably, while we wander around, prisoners of our love of detail."
In English, the expression — either in the Latin (tempus fugit) or English form ("time flies") — is proverbial, generally with the intended sense, "Time's a-wasting". As such, it expresses concern that one's limited time is being consumed by nothing in particular or by something which may have little intrinsic substance, importance, or urgency. It can also mean that time seems to pass very quickly, or without notice, such as in the phrase "Time flies when you are having fun."