| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| AD 3 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | AD 3 III |
| Ab urbe condita | 756 |
| Assyrian calendar | 4753 |
| Balinese saka calendar | N/A |
| Bengali calendar | −590 |
| Berber calendar | 953 |
| Buddhist calendar | 547 |
| Burmese calendar | −635 |
| Byzantine calendar | 5511–5512 |
| Chinese calendar | 壬戌年 (Water Dog) 2700 or 2493 — to — 癸亥年 (Water Pig) 2701 or 2494 |
| Coptic calendar | −281 – −280 |
| Discordian calendar | 1169 |
| Ethiopian calendar | −5 – −4 |
| Hebrew calendar | 3763–3764 |
| Hindu calendars | |
| - Vikram Samvat | 59–60 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 3103–3104 |
| Holocene calendar | 10003 |
| Iranian calendar | 619 BP – 618 BP |
| Islamic calendar | 638 BH – 637 BH |
| Javanese calendar | N/A |
| Julian calendar | AD 3 III |
| Korean calendar | 2336 |
| Minguo calendar | 1909 before ROC 民前1909年 |
| Nanakshahi calendar | −1465 |
| Seleucid era | 314/315 AG |
| Thai solar calendar | 545–546 |
| Tibetan calendar | 阳水狗年 (male Water-Dog) 129 or −252 or −1024 — to — 阴水猪年 (female Water-Pig) 130 or −251 or −1023 |
AD 3 (III) or 3 AD was a common year starting on Monday or Tuesday (link will display the full calendar) of the Julian calendar (sources differ, see leap year error for further information) and a common year starting on Monday of the proleptic Julian calendar. In the Roman Empire, it was the Year of the Consulship of Lamia and Servilius (or, less frequently, year 756 Ab urbe condita). The denomination "AD 3" 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.
AD 3 was the only prime-numbered Year of the Pig.