| Millennium: | 2nd millennium |
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| Centuries: |
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| Decades: |
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| Years: |
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| 1730 by topic |
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| Arts and science |
| Countries |
| Lists of leaders |
| Birth and death categories |
| Establishments and disestablishments categories |
| Works category |
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| Gregorian calendar | 1730 MDCCXXX |
| Ab urbe condita | 2483 |
| Armenian calendar | 1179 ԹՎ ՌՃՀԹ |
| Assyrian calendar | 6480 |
| Balinese saka calendar | 1651–1652 |
| Bengali calendar | 1137 |
| Berber calendar | 2680 |
| British Regnal year | 3 Geo. 2 – 4 Geo. 2 |
| Buddhist calendar | 2274 |
| Burmese calendar | 1092 |
| Byzantine calendar | 7238–7239 |
| Chinese calendar | 己酉年 (Earth Rooster) 4427 or 4220 — to — 庚戌年 (Metal Dog) 4428 or 4221 |
| Coptic calendar | 1446–1447 |
| Discordian calendar | 2896 |
| Ethiopian calendar | 1722–1723 |
| Hebrew calendar | 5490–5491 |
| Hindu calendars | |
| - Vikram Samvat | 1786–1787 |
| - Shaka Samvat | 1651–1652 |
| - Kali Yuga | 4830–4831 |
| Holocene calendar | 11730 |
| Igbo calendar | 730–731 |
| Iranian calendar | 1108–1109 |
| Islamic calendar | 1142–1143 |
| Japanese calendar | Kyōhō15 (享保15年) |
| Javanese calendar | 1654–1655 |
| Julian calendar | Gregorian minus 11 days |
| Korean calendar | 4063 |
| Minguo calendar | 182 before ROC 民前182年 |
| Nanakshahi calendar | 262 |
| Thai solar calendar | 2272–2273 |
| Tibetan calendar | 阴土鸡年 (female Earth-Rooster) 1856 or 1475 or 703 — to — 阳金狗年 (male Iron-Dog) 1857 or 1476 or 704 |
1730 (MDCCXXX) was a common year starting on Sunday of the Gregorian calendar and a common year starting on Thursday of the Julian calendar, the 1730th year of the Common Era (CE) and Anno Domini (AD) designations, the 730th year of the 2nd millennium, the 30th year of the 18th century, and the 1st year of the 1730s decade. As of the start of 1730, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.
