the.com/decade

ten years that feel like forever to live and a blink to remember

means A period of ten years, especially one reckoned within a century (like the 1990s).

from From Latin 'decas,' borrowed from Greek 'dekas,' meaning 'a group of ten' — built on 'deka,' the Greek word for ten, a distant cousin of Latin 'decem' and English 'ten' through the shared Indo-European root for the number. Originally a 'decade' could be any set of ten things (ten books, ten soldiers); the now-dominant sense of ten years settled in over time.

origin
From Greek dekas, meaning a group of ten
disputed start
Decades arguably begin in year one, not zero
rosary use
A decade also means ten prayer beads
naming lag
Decades rarely get personalities until they end
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