| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1684 by topic |
|---|
| Arts and science |
| Leaders |
| Birth and death categories |
| Births – Deaths |
| Establishments and disestablishments categories |
| Establishments – Disestablishments |
| Works category |
| Gregorian calendar | 1684 MDCLXXXIV |
| Ab urbe condita | 2437 |
| Armenian calendar | 1133 ԹՎ ՌՃԼԳ |
| Assyrian calendar | 6434 |
| Balinese saka calendar | 1605–1606 |
| Bengali calendar | 1091 |
| Berber calendar | 2634 |
| English Regnal year | 35 Cha. 2 – 36 Cha. 2 |
| Buddhist calendar | 2228 |
| Burmese calendar | 1046 |
| Byzantine calendar | 7192–7193 |
| Chinese calendar | 癸亥年 (Water Pig) 4381 or 4174 — to — 甲子年 (Wood Rat) 4382 or 4175 |
| Coptic calendar | 1400–1401 |
| Discordian calendar | 2850 |
| Ethiopian calendar | 1676–1677 |
| Hebrew calendar | 5444–5445 |
| Hindu calendars | |
| - Vikram Samvat | 1740–1741 |
| - Shaka Samvat | 1605–1606 |
| - Kali Yuga | 4784–4785 |
| Holocene calendar | 11684 |
| Igbo calendar | 684–685 |
| Iranian calendar | 1062–1063 |
| Islamic calendar | 1095–1096 |
| Japanese calendar | Tenna 4 / Jōkyō 1 (貞享元年) |
| Javanese calendar | 1606–1607 |
| Julian calendar | Gregorian minus 10 days |
| Korean calendar | 4017 |
| Minguo calendar | 228 before ROC 民前228年 |
| Nanakshahi calendar | 216 |
| Thai solar calendar | 2226–2227 |
| Tibetan calendar | 阴水猪年 (female Water-Pig) 1810 or 1429 or 657 — to — 阳木鼠年 (male Wood-Rat) 1811 or 1430 or 658 |
1684 (MDCLXXXIV) was a leap year starting on Saturday of the Gregorian calendar and a leap year starting on Tuesday of the Julian calendar, the 1684th year of the Common Era (CE) and Anno Domini (AD) designations, the 684th year of the 2nd millennium, the 84th year of the 17th century, and the 5th year of the 1680s decade. As of the start of 1684, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.