| Millennium: | 1st millennium |
|---|---|
| Centuries: | 7th century – 8th century – 9th century |
| Decades: | 710s 720s 730s – 740s – 750s 760s 770s |
| Years: | 737 738 739 – 740 – 741 742 743 |
| 740 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 740 DCCXL |
| Ab urbe condita | 1493 |
| Armenian calendar | 189 ԹՎ ՃՁԹ |
| Assyrian calendar | 5490 |
| Bahá'í calendar | -1104–-1103 |
| Bengali calendar | 147 |
| Berber calendar | 1690 |
| English Regnal year | N/A |
| Buddhist calendar | 1284 |
| Burmese calendar | 102 |
| Byzantine calendar | 6248–6249 |
| Chinese calendar | 己卯年十一月廿八日 (3376/3436-11-28) — to —
庚辰年十二月初九日(3377/3437-12-9) |
| Coptic calendar | 456–457 |
| Ethiopian calendar | 732–733 |
| Hebrew calendar | 4500–4501 |
| Hindu calendars | |
| - Vikram Samvat | 796–797 |
| - Shaka Samvat | 662–663 |
| - Kali Yuga | 3841–3842 |
| Holocene calendar | 10740 |
| Iranian calendar | 118–119 |
| Islamic calendar | 122–123 |
| Japanese calendar | |
| Korean calendar | 3073 |
| Minguo calendar | 1172 before ROC 民前1172年 |
| Thai solar calendar | 1283 |
Year 740 (DCCXL) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar. The denomination 740 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.