| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1728 by topic |
|---|
| Arts and science |
| Countries |
| Lists of leaders |
| Birth and death categories |
| Establishments and disestablishments categories |
| Works category |
| Gregorian calendar | 1728 MDCCXXVIII |
| Ab urbe condita | 2481 |
| Armenian calendar | 1177 ԹՎ ՌՃՀԷ |
| Assyrian calendar | 6478 |
| Balinese saka calendar | 1649–1650 |
| Bengali calendar | 1135 |
| Berber calendar | 2678 |
| British Regnal year | 1 Geo. 2 – 2 Geo. 2 |
| Buddhist calendar | 2272 |
| Burmese calendar | 1090 |
| Byzantine calendar | 7236–7237 |
| Chinese calendar | 丁未年 (Fire Goat) 4425 or 4218 — to — 戊申年 (Earth Monkey) 4426 or 4219 |
| Coptic calendar | 1444–1445 |
| Discordian calendar | 2894 |
| Ethiopian calendar | 1720–1721 |
| Hebrew calendar | 5488–5489 |
| Hindu calendars | |
| - Vikram Samvat | 1784–1785 |
| - Shaka Samvat | 1649–1650 |
| - Kali Yuga | 4828–4829 |
| Holocene calendar | 11728 |
| Igbo calendar | 728–729 |
| Iranian calendar | 1106–1107 |
| Islamic calendar | 1140–1141 |
| Japanese calendar | Kyōhō 13 (享保１３年) |
| Javanese calendar | 1652–1653 |
| Julian calendar | Gregorian minus 11 days |
| Korean calendar | 4061 |
| Minguo calendar | 184 before ROC 民前184年 |
| Nanakshahi calendar | 260 |
| Thai solar calendar | 2270–2271 |
| Tibetan calendar | 阴火羊年 (female Fire-Goat) 1854 or 1473 or 701 — to — 阳土猴年 (male Earth-Monkey) 1855 or 1474 or 702 |
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1728 (MDCCXXVIII) was a leap year starting on Thursday of the Gregorian calendar and a leap year starting on Monday of the Julian calendar, the 1728th year of the Common Era (CE) and Anno Domini (AD) designations, the 728th year of the 2nd millennium, the 28th year of the 18th century, and the 9th year of the 1720s decade. As of the start of 1728, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.