Hi there, variations on this question have been asked many, many times before and may be worth looking at:
https://www.reddit.com/r/AskHistorians/comments/30kwoj/what_were_different_decades_in_the_1800s_like/ https://www.reddit.com/r/AskHistorians/comments/22oenl/people_of_our_day_and_age_can_easily_distinguish/ https://www.reddit.com/r/AskHistorians/comments/1ndi5s/did_other_decades_experience_cultural/ https://www.reddit.com/r/AskHistorians/comments/1f59f6/when_did_people_begin_referring_to_decades_as/
Also just use the search bar for "decade" and a whole lot comes up.