WORD OF THE DAY.
Ephemera are any transitory written or printed matters that are not meant to be retained or preserved. The word derives from the Greek ephemeros, meaning "lasting only one day, short-lived".
noun plural noun: ephemera; noun: ephemerum
things that exist or are used or enjoyed for only a short time. "there were papers, letters, old boxes—all sorts of ephemera"
Late 16th century: plural of ephemeron, from Greek, neuter of ephēmeros ‘lasting only a day’. As a singular noun the word originally denoted a plant said by ancient writers to last only one day, or an insect with a short lifespan, and hence was applied (late 18th century) to a person or thing of short-lived interest. Current use has been influenced by plurals such as trivia and memorabilia .