| Millennium: | 1st millennium |
|---|---|
| Centuries: | 7th century – 8th century – 9th century |
| Decades: | 690s 700s 710s – 720s – 730s 740s 750s |
| Years: | 725 726 727 – 728 – 729 730 731 |
| 728 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 728 DCCXXVIII |
| Ab urbe condita | 1481 |
| Armenian calendar | 177 ԹՎ ՃՀԷ |
| Assyrian calendar | 5478 |
| Bahá'í calendar | -1116–-1115 |
| Bengali calendar | 135 |
| Berber calendar | 1678 |
| English Regnal year | N/A |
| Buddhist calendar | 1272 |
| Burmese calendar | 90 |
| Byzantine calendar | 6236–6237 |
| Chinese calendar | 丁卯年十一月十五日 (3364/3424-11-15) — to —
戊辰年十一月廿六日(3365/3425-11-26) |
| Coptic calendar | 444–445 |
| Ethiopian calendar | 720–721 |
| Hebrew calendar | 4488–4489 |
| Hindu calendars | |
| - Vikram Samvat | 784–785 |
| - Shaka Samvat | 650–651 |
| - Kali Yuga | 3829–3830 |
| Holocene calendar | 10728 |
| Iranian calendar | 106–107 |
| Islamic calendar | 109–110 |
| Japanese calendar | |
| Korean calendar | 3061 |
| Minguo calendar | 1184 before ROC 民前1184年 |
| Thai solar calendar | 1271 |
Year 728 (DCCXXVIII) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar. The denomination 728 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.