728 BC
| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 728 BC DCCXXVII BC |
| Ab urbe condita | 26 |
| Ancient Egypt era | XXV dynasty, 25 |
| - Pharaoh | Piye, 25 |
| Ancient Greek era | 13th Olympiad (victor)¹ |
| Assyrian calendar | 4023 |
| Bengali calendar | −1320 |
| Berber calendar | 223 |
| Buddhist calendar | −183 |
| Burmese calendar | −1365 |
| Byzantine calendar | 4781–4782 |
| Chinese calendar |
壬子年 (Water Rat) 1969 or 1909 — to — 癸丑年 (Water Ox) 1970 or 1910 |
| Coptic calendar | −1011 – −1010 |
| Discordian calendar | 439 |
| Ethiopian calendar | −735 – −734 |
| Hebrew calendar | 3033–3034 |
| Hindu calendars | |
| - Vikram Samvat | −671 – −670 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2373–2374 |
| Holocene calendar | 9273 |
| Iranian calendar | 1349 BP – 1348 BP |
| Islamic calendar | 1390 BH – 1389 BH |
| Javanese calendar | N/A |
| Julian calendar | N/A |
| Korean calendar | 1606 |
| Minguo calendar | 2639 before ROC 民前2639年 |
| Nanakshahi calendar | −2195 |
| Thai solar calendar | −185 – −184 |
...
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