| 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 |
| Bahá'í calendar | -1116 – -1115 |
| Bengali calendar | 135 |
| Berber calendar | 1678 |
| 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 | |
| - Bikram Samwat | 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 |
| Thai solar calendar | 1271 |