Historical eventOctober 18320

Pappus of Alexandria

Pappus of Alexandria, one of the last great Greek mathematicians of antiquity, observed an eclipse that allowed historians to calculate the approximate dates of his life.

Everything on October 18Original source

In context

When
Tuesday, October 18 3201706 years ago
Category
Historical eventA dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
Era
4th century · 320s
Calendar
Julian — as recorded at the time
Recorded from
Wikipedia “On this day” feed

Dates before 15 October 1582 are in the Julian calendar, so the weekday shown follows the Julian reckoning of the time.

At a glance

Dates: From 320.

What happened

Pappus of Alexandria, one of the last great Greek mathematicians of antiquity, observed an eclipse that allowed historians to calculate the approximate dates of his life.

October 18 through the years

Other entries on the same calendar day, in order.

  1. 320Pappus of Alexandria
  2. 1979Federal Communications Commission
  3. 1989Space Shuttle Atlantis
  4. 1991Azerbaijan
  5. 1992Merpati Nusantara Airlines Flight 5601
  6. 1993Nihilism (collection)
  7. 2003Bolivian gas war
  8. 20072007 Karsaz bombing
  9. 2019NASA Astronaut Corps
  10. 2019Social Outburst (Chile)
  11. 2019Santiago

Sources

Cite this page

“Pappus of Alexandria”, What's On This Date, https://whatsonthisdate.com/app/event/pappus-of-alexandria-320-october-18, accessed October 29, 2026.

Cite the underlying source as well — the source links above go to the record this entry is adapted from.

Questions about this entry

When did Pappus of Alexandria happen?

October 18 320 — 1706 years ago, on a Tuesday.

Is this a Julian or a Gregorian date?

It is the date as recorded at the time, on the Julian calendar. The Gregorian equivalent falls about ten days later; sources from different countries may give either.

Where does this text come from?

Wikipedia “On this day” feed. Summaries are short adaptations that link back to the source, not reprints.

How do I cite this page?

Use the ready-made citation near the sources at the bottom of the page, and follow the source link to cite the underlying record as well.

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