Noteworthy timespan (3)
I believe the answer is:
era
(Other definitions for era that I've seen before include "Characteristic period" , "day" , "Series of years" , "Important historical period" , "Important date" .)
I believe the answer is:
era
(Other definitions for era that I've seen before include "Characteristic period" , "day" , "Series of years" , "Important historical period" , "Important date" .)