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| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 221 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 221 CCXXI |
| Ab urbe condita | 974 |
| Assyrian calendar | 4971 |
| Balinese saka calendar | 142–143 |
| Bengali calendar | −372 |
| Berber calendar | 1171 |
| Buddhist calendar | 765 |
| Burmese calendar | −417 |
| Byzantine calendar | 5729–5730 |
| Chinese calendar | 庚子年 (Metal Rat) 2918 or 2711 — to — 辛丑年 (Metal Ox) 2919 or 2712 |
| Coptic calendar | −63 – −62 |
| Discordian calendar | 1387 |
| Ethiopian calendar | 213–214 |
| Hebrew calendar | 3981–3982 |
| Hindu calendars | |
| - Vikram Samvat | 277–278 |
| - Shaka Samvat | 142–143 |
| - Kali Yuga | 3321–3322 |
| Holocene calendar | 10221 |
| Iranian calendar | 401 BP – 400 BP |
| Islamic calendar | 413 BH – 412 BH |
| Javanese calendar | 99–100 |
| Julian calendar | 221 CCXXI |
| Korean calendar | 2554 |
| Minguo calendar | 1691 before ROC 民前1691年 |
| Nanakshahi calendar | −1247 |
| Seleucid era | 532/533 AG |
| Thai solar calendar | 763–764 |
| Tibetan calendar | 阳金鼠年 (male Iron-Rat) 347 or −34 or −806 — to — 阴金牛年 (female Iron-Ox) 348 or −33 or −805 |
Year 221 (CCXXI) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Gratus and Vitellius (or, less frequently, year 974 Ab urbe condita). The denomination 221 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.