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.

Millennium: 2nd millennium
Centuries: 17th century18th century19th century
Decades: 1700s  1710s  1720s  – 1730s –  1740s  1750s  1760s
Years: 1727 1728 172917301731 1732 1733
1730 in other calendars
Gregorian calendar1730
Ab urbe condita2483
Armenian calendar1179
Assyrian calendar6480
Balinese saka calendar1651–1652
Bengali calendar1137
Berber calendar2680
British Regnal yearGeo. 2 – 4 Geo. 2
Buddhist calendar2274
Burmese calendar1092
Byzantine calendar7238–7239
Chinese calendar己酉(Earth Rooster)
4426 or 4366
    — to —
庚戌年 (Metal Dog)
4427 or 4367
Coptic calendar1446–1447
Discordian calendar2896
Ethiopian calendar1722–1723
Hebrew calendar5490–5491
Hindu calendars
 - Vikram Samvat1786–1787
 - Shaka Samvat1651–1652
 - Kali Yuga4830–4831
Holocene calendar11730
Igbo calendar730–731
Iranian calendar1108–1109
Islamic calendar1142–1143
Japanese calendarKyōhō 15
Javanese calendar1654–1655
Julian calendarGregorian minus 11 days
Korean calendar4063
Minguo calendar182 before ROC
Nanakshahi calendar262
Thai solar calendar2272–2273
Tibetan calendar阴土鸡年
(female Earth-Rooster)
1856 or 1475 or 703
    — to —
(male Iron-Dog)
1857 or 1476 or 704