The Wayback Machine

From Esri: Wayback imagery is a digital archive of the World Imagery basemap, enabling users to access more than 80 different versions of World Imagery captured over the past 5 years.

• Read more at Wayback - 81 Flavors of World Imagery
• The World Imagery Wayback app
• Using World Imagery Wayback

I suppose going back 5 years is useful, but a longer time frame would be better.