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1280 (MCCLXXX) was a leap year starting on Monday in the Julian calendar. It was the 1280th year of the Common Era (CE) and Anno Domini (AD) designations, the 280th year of the 2nd millennium, the 80th year of the 13th century, and the first year of the 1280s decade.
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edw year mcclxxx calendar 1202 1337 first solar julian magnus iii approximate calendars 1201 polynesia 1368 mansa english chinese june
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| 1280 | - Kali Yuga | 4380–4381 | 1.00 | infobox |
| 1280 | - Shaka Samvat | 1201–1202 | 1.00 | infobox |
| 1280 | - Vikram Samvat | 1336–1337 | 1.00 | infobox |
| 1280 | Ab urbe condita | 2033 | 1.00 | infobox |
| 1280 | Armenian calendar | 729 ԹՎ ՉԻԹ | 1.00 | infobox |
| 1280 | Assyrian calendar | 6030 | 1.00 | infobox |
| 1280 | Balinese saka calendar | 1201–1202 | 1.00 | infobox |
| 1280 | Bengali calendar | 686–687 | 1.00 | infobox |
| 1280 | Berber calendar | 2230 | 1.00 | infobox |
| 1280 | Buddhist calendar | 1824 | 1.00 | infobox |
| 1280 | Burmese calendar | 642 | 1.00 | infobox |
| 1280 | Byzantine calendar | 6788–6789 | 1.00 | infobox |
| 1280 | Chinese calendar | 己卯年 (Earth Rabbit) 3977 or 3770 — to — 庚辰年 (Metal Dragon) 3978 or 3771 | 1.00 | infobox |
| 1280 | Coptic calendar | 996–997 | 1.00 | infobox |
| 1280 | Discordian calendar | 2446 | 1.00 | infobox |
| 1280 | English Regnal year | 8 Edw. 1 – 9 Edw. 1 | 1.00 | infobox |
| 1280 | Ethiopian calendar | 1272–1273 | 1.00 | infobox |
| 1280 | Gregorian calendar | 1280 MCCLXXX | 1.00 | infobox |
| 1280 | Hebrew calendar | 5040–5041 | 1.00 | infobox |
| 1280 | Holocene calendar | 11280 | 1.00 | infobox |
| 1280 | Igbo calendar | 280–281 | 1.00 | infobox |
| 1280 | Iranian calendar | 658–659 | 1.00 | infobox |
| 1280 | Islamic calendar | 678–679 | 1.00 | infobox |
| 1280 | Japanese calendar | Kōan 3 (弘安３年) | 1.00 | infobox |
| 1280 | Javanese calendar | 1190–1191 | 1.00 | infobox |
| 1280 | Julian calendar | 1280 MCCLXXX | 1.00 | infobox |
| 1280 | Korean calendar | 3613 | 1.00 | infobox |
| 1280 | Minguo calendar | 632 before ROC 民前632年 | 1.00 | infobox |
| 1280 | Nanakshahi calendar | −188 | 1.00 | infobox |
| 1280 | Thai solar calendar | 1822–1823 | 1.00 | infobox |
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