642

Millennium: 1st millennium
Centuries:
Decades:
Years:
642 in various calendars
Gregorian calendar642
DCXLII
Ab urbe condita1395
Armenian calendar91
ԹՎ ՂԱ
Assyrian calendar5392
Balinese saka calendar563–564
Bengali calendar49
Berber calendar1592
Buddhist calendar1186
Burmese calendar4
Byzantine calendar6150–6151
Chinese calendar辛丑年 (Metal Ox)
3339 or 3132
    — to —
壬寅年 (Water Tiger)
3340 or 3133
Coptic calendar358–359
Discordian calendar1808
Ethiopian calendar634–635
Hebrew calendar4402–4403
Hindu calendars
 - Vikram Samvat698–699
 - Shaka Samvat563–564
 - Kali Yuga3742–3743
Holocene calendar10642
Iranian calendar20–21
Islamic calendar21–22
Japanese calendarN/A
Javanese calendar532–533
Julian calendar642
DCXLII
Korean calendar2975
Minguo calendar1270 before ROC
民前1270年
Nanakshahi calendar−826
Seleucid era953/954 AG
Thai solar calendar1184–1185
Tibetan calendar阴金牛年
(female Iron-Ox)
768 or 387 or −385
    — to —
阳水虎年
(male Water-Tiger)
769 or 388 or −384
Pope Theodore I (642–649)

Year 642 (DCXLII) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. The denomination 642 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.