Fashion History Timeline from the Fashion Institute of Technology https://fashionhistory.fitnyc.edu/
The Fashion History Timeline is an open-access source for fashion history knowledge, featuring objects and artworks from over a hundred museums and libraries that span the globe. The Timeline website offers well-researched, accessibly written entries on specific artworks, garments and films for those interested in fashion and dress history.
Gale Ebooks https://go.gale.com/ps/dispBasicSearch.do?userGroupName=pl2497&prodId=GVRL
Example: "fashion 1960s"
Fashion Websites
Fashion Era https://fashion-era.com/
Fashion-era looks at women's costumes and fashion history and analyses the mood of an era. Changes in technology, leisure, work, cultural and moral values, homelife, and politics have all contributed to lifestyle trends that influence the clothes women in particular choose to wear.
Fashion Through the Decades (1970s - 2000s) https://www.harpercollege.edu/library/archives/exhibits/fashion-decades.php
Gives a brief summary of the fashion of the decade and what was happening during that time period.