History · Anniversaries
50th anniversary: A series of celestial phenomena of disputed nature was observed in the western...
Mon, September 20, 2027
in 10 mo
In 1977, A series of celestial phenomena of disputed nature was observed in the western Soviet Union, Finland and Denmark.
Also on Sep 20, 2027
Source, method and history
- Source
- Wikipedia
- How we know
- Wikipedia "On this day" selected anniversary, 50 years (1977 to 2027).
- Recurs
- annual
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- Changes
- None recorded.