| Millennium: | 2nd Millennium BC |
|---|---|
| Centuries: | 18th cent. BC – 17th cent. BC – 16th cent. BC |
| Decades: | 1710s BC 1700s BC 1690s BC – 1680s BC – 1670s BC 1660s BC 1650s BC |
| Years: | 1687 BC 1686 BC 1685 BC – 1684 BC – 1683 BC 1682 BC 1681 BC |
| Gregorian calendar | 1684 MDCLXXXIV |
| Ab urbe condita | 2437 |
| Armenian calendar | 1133 ԹՎ ՌՃԼԳ |
| Assyrian calendar | 6434 |
| 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) 4380 or 4320 — to — 甲子年 (Wood Rat) 4381 or 4321 |
| 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 |
The year 1684 BC