121

Millennium:	1st millennium
Centuries:	1st century 2nd century 3rd century
Decades:	100s 110s 120s 130s 140s
Years:	118 119 120 121 122 123 124

121 in various calendars

Gregorian calendar	121 CXXI
Ab urbe condita	874
Assyrian calendar	4871
Bengali calendar	−472
Berber calendar	1071
Buddhist calendar	665
Burmese calendar	−517
Byzantine calendar	5629–5630
Chinese calendar	庚申年 (Metal Monkey) 2817 or 2757     — to — 辛酉年 (Metal Rooster) 2818 or 2758
Coptic calendar	−163 – −162
Discordian calendar	1287
Ethiopian calendar	113–114
Hebrew calendar	3881–3882
Hindu calendars
- Vikram Samvat	177–178
- Shaka Samvat	42–43
- Kali Yuga	3221–3222
Holocene calendar	10121
Iranian calendar	501 BP – 500 BP
Islamic calendar	516 BH – 515 BH
Javanese calendar	N/A
Julian calendar	121 CXXI
Korean calendar	2454
Minguo calendar	1791 before ROC 民前1791年
Nanakshahi calendar	−1347
Seleucid era	432/433 AG
Thai solar calendar	663–664
This box:

Year 121 (CXXI) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Verus and Augur (or, less frequently, year 874 Ab urbe condita). The denomination 121 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.

...
Wikipedia