| Millennium: | 4th Millennium BC |
|---|---|
| Centuries: | 39th cent. BC – 38th cent. BC – 37th cent. BC |
| Decades: | 3770s BC 3760s BC 3750s BC – 3740s BC – 3730s BC 3720s BC 3710s BC |
| Years: | 3752 BC 3751 BC 3750 BC – 3749 BC – 3748 BC 3747 BC 3746 BC |
| Gregorian calendar | 3749 MMMDCCXLIX |
| Ab urbe condita | 4502 |
| Armenian calendar | 3198 ԹՎ ՎՃՂԸ |
| Assyrian calendar | 8499 |
| Bahá'í calendar | 1905–1906 |
| Bengali calendar | 3156 |
| Berber calendar | 4699 |
| British Regnal year | N/A |
| Buddhist calendar | 4293 |
| Burmese calendar | 3111 |
| Byzantine calendar | 9257–9258 |
| Chinese calendar | 戊子年 (Earth Rat) 6445 or 6385 — to — 己丑年 (Earth Ox) 6446 or 6386 |
| Coptic calendar | 3465–3466 |
| Discordian calendar | 4915 |
| Ethiopian calendar | 3741–3742 |
| Hebrew calendar | 7509–7510 |
| Hindu calendars | |
| - Vikram Samvat | 3805–3806 |
| - Shaka Samvat | 3670–3671 |
| - Kali Yuga | 6849–6850 |
| Holocene calendar | 13749 |
| Igbo calendar | 2749–2750 |
| Iranian calendar | 3127–3128 |
| Islamic calendar | 3223–3224 |
| Japanese calendar | Heisei 1761 (平成１７６１年) |
| Javanese calendar | 3735–3736 |
| Juche calendar | 1838 |
| Julian calendar | Gregorian minus 26 days |
| Korean calendar | 6082 |
| Minguo calendar | ROC 1838 民國1838年 |
| Nanakshahi calendar | 2281 |
| Thai solar calendar | 4292 |
| Unix time | 56139868800–56171404799 |
The year 3749 BC