Historical eventDecember 30999

AD 999

In Ireland, the combined forces of Munster and Meath crushed a rebellion by Leinster and Dublin.

Everything on December 30Original source

In context

When
Saturday, December 30 9991027 years ago
Category
Historical eventA dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
Era
10th century · 990s
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 999-01-01.

Type: year.

What came before

Part of: 990s.

Timeline

Follows: 998. Followed by: 1000.

What happened

In Ireland, the combined forces of Munster and Meath crushed a rebellion by Leinster and Dublin.

December 30 through the years

Other entries on the same calendar day, in order.

  1. 999AD 999
  2. 2006Madrid–Barajas Airport
  3. 2006MV Senopati Nusantara
  4. 2006Saddam Hussein
  5. 2006Basque nationalism
  6. 20092009 Iranian pro-government rallies
  7. 2009Lanzhou–Zhengzhou–Changsha pipeline
  8. 2009Camp Chapman attack
  9. 2013Paul-Joseph Mukungubila
  10. 2013December 2013 Kinshasa attacks
  11. 20202020 Aden airport attack

Sources

Cite this page

“AD 999”, What's On This Date, https://whatsonthisdate.com/app/event/ad-999-999-december-30, accessed October 25, 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 AD 999 happen?

December 30 999 — 1027 years ago, on a Saturday.

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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