Anniversaries: X years ago today

English-speaking community for anniversaries. This also includes personal events!

Rules:

• Mandatory title format: "X years ago today […]", where of course X is replaced by the number of years.
• X ≥ 5.
• English language only, but links to non-English sources are allowed if a (short) English summary is provided.

Resources for discovering anniversaries:

• https://en.wikipedia.org/wiki/Main_Page > On this day
• http://news.bbc.co.uk/onthisday/default.stm
• https://www.onthisday.com/
• https://learning.blogs.nytimes.com/on-this-day/
• https://www.loc.gov/collections/today-in-history/
• https://www.history.com/this-day-in-history

German resources:

• https://www.deutschlandfunk.de/kalenderblatt-100.html
• https://www.bremeneins.de/themen/chronik-114.html
• https://www1.wdr.de/radio/wdr5/sendungen/zeitzeichen/index.html