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Birth 842 Birth, Marriage, Death in the UK 842
- 842
- 842
- 842

842
| Millennium: |
1st millennium |
| Centuries: |
8th century - 9th century - 10th century |
| Decades: |
810s 820s 830s - 840s - 850s 860s 870s |
| Years: |
839 840 841 - 842 - 843 844 845 |
| 842 by topic
v • d • e
|
| Politics |
| State leaders - Sovereign states |
| Birth and death categories |
| Births - Deaths |
| Establishment and disestablishment categories |
| Establishments - Disestablishments |
842 in other calendars
| Gregorian calendar |
842
DCCCXLII |
| Ab urbe condita |
1595 |
| Armenian calendar |
291
ԹՎ ՄՂԱ |
| Bahá'í calendar |
-1002 – -1001 |
| Berber calendar |
1792 |
| Buddhist calendar |
1386 |
| Burmese calendar |
204 |
| Byzantine calendar |
6350 – 6351 |
| Chinese calendar |
辛酉年十一月十六日
(3478/3538-11-16)
— to —
壬戌年十一月廿六日
(3479/3539-11-26) |
| Coptic calendar |
558 – 559 |
| Ethiopian calendar |
834 – 835 |
| Hebrew calendar |
4602 – 4603 |
| Hindu calendars |
|
| - Vikram Samvat |
897 – 898 |
| - Shaka Samvat |
764 – 765 |
| - Kali Yuga |
3943 – 3944 |
| Holocene calendar |
10842 |
| Iranian calendar |
220 – 221 |
| Islamic calendar |
227 – 228 |
| Japanese calendar |
|
| Korean calendar |
3175 |
| Thai solar calendar |
1385 |
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v • d • e
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- February 14 - Charles the Bald and Louis the German sign a treaty.
- Cerball mac Dúnlainge becomes king of Osraige
- The Oaths of Strasbourg — an alliance of Louis the German and Charles the Bald against emperor Lothar — are sworn and recorded in the vernacular languages.
- Ramiro I succeeds Alfonso II as king of Asturias.
- Uurad is succeeded by Bred, then Ciniod as King of the Picts.
- Charles the Bald marries Ermentrude.
- Three year old Michael III succeeds Theophilus (emperor) as emperor of Byzantium.
- The reign of caliph Moqtasim ends.
- The Uyghurs leave the Mongolian plateau.
- January 5 — Al-Mu'tasim, Abbasid caliph (b. 794)
- Emperor Saga of Japan (b. 786)
- Alfonso II of Asturias (b. 759)
- Theophilus, Byzantine Emperor (b. 813)
- Liu Yuxi, Chinese poet, philosopher, and essayist (b. 772)
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