| Millennium: | 1st millennium |
|---|---|
| Centuries: |
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| Decades: |
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| Years: |
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| 842 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 842 DCCCXLII |
| Ab urbe condita | 1595 |
| Armenian calendar | 291 ԹՎ ՄՂԱ |
| Assyrian calendar | 5592 |
| Balinese saka calendar | 763–764 |
| Bengali calendar | 249 |
| Berber calendar | 1792 |
| Buddhist calendar | 1386 |
| Burmese calendar | 204 |
| Byzantine calendar | 6350–6351 |
| Chinese calendar | 辛酉年 (Metal Rooster) 3539 or 3332 — to — 壬戌年 (Water Dog) 3540 or 3333 |
| Coptic calendar | 558–559 |
| Discordian calendar | 2008 |
| Ethiopian calendar | 834–835 |
| Hebrew calendar | 4602–4603 |
| Hindu calendars | |
| - Vikram Samvat | 898–899 |
| - Shaka Samvat | 763–764 |
| - Kali Yuga | 3942–3943 |
| Holocene calendar | 10842 |
| Iranian calendar | 220–221 |
| Islamic calendar | 227–228 |
| Japanese calendar | Jōwa9 (承和9年) |
| Javanese calendar | 739–740 |
| Julian calendar | 842 DCCCXLII |
| Korean calendar | 3175 |
| Minguo calendar | 1070 before ROC 民前1070年 |
| Nanakshahi calendar | −626 |
| Seleucid era | 1153/1154 AG |
| Thai solar calendar | 1384–1385 |
| Tibetan calendar | 阴金鸡年 (female Iron-Rooster) 968 or 587 or −185 — to — 阳水狗年 (male Water-Dog) 969 or 588 or −184 |
Year 842 (DCCCXLII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar, the 842nd year of the Common Era (CE) and Anno Domini (AD) designations, the 842nd year of the 1st millennium, the 42nd year of the 9th century, and the 3rd year of the 840s decade.
