721 BC

Millennium:	1st millennium BC
Centuries:	9th century BC – 8th century BC – 7th century BC
Decades:	750s BC  740s BC  730s BC  – 720s BC –  710s BC  700s BC  690s BC
Years:	724 BC 723 BC 722 BC – 721 BC – 720 BC 719 BC 718 BC

721 BC in other calendars

Gregorian calendar	721 BC DCCXX BC
Ab urbe condita	33
Ancient Egypt era	XXV dynasty, 32
- Pharaoh	Shabaka, 1
Ancient Greek era	14th Olympiad, year 4
Assyrian calendar	4030
Bengali calendar	−1313
Berber calendar	230
Buddhist calendar	−176
Burmese calendar	−1358
Byzantine calendar	4788–4789
Chinese calendar	己未年 (Earth Goat) 1976 or 1916     — to — 庚申年 (Metal Monkey) 1977 or 1917
Coptic calendar	−1004 – −1003
Discordian calendar	446
Ethiopian calendar	−728 – −727
Hebrew calendar	3040–3041
Hindu calendars
- Vikram Samvat	−664 – −663
- Shaka Samvat	N/A
- Kali Yuga	2381–2382
Holocene calendar	9280
Iranian calendar	1342 BP – 1341 BP
Islamic calendar	1383 BH – 1382 BH
Julian calendar	N/A
Korean calendar	1613
Minguo calendar	2632 before ROC 民前2632年
Thai solar calendar	−178 – −177

Deaths

• Piye, a Kushite king and founder of the Twenty-fifth Dynasty of Egypt