1623 (MDCXXIII) was a common year starting on Sunday of the Gregorian calendar and a common year starting on Wednesday of the Julian calendar, the 1623rd year of the Common Era (CE) and Anno Domini (AD) designations, the 623rd year of the 2nd millennium, the 23rd year of the 17th century, and the 4th year of the 1620s decade. As of the start of 1623, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.

Millennium: 2nd millennium
Centuries: 16th century17th century18th century
Decades: 1590s  1600s  1610s  – 1620s –  1630s  1640s  1650s
Years: 1620 1621 162216231624 1625 1626
1623 in other calendars
Gregorian calendar1623
MDCXXIII
Ab urbe condita2376
Armenian calendar1072
ԹՎ ՌՀԲ
Assyrian calendar6373
Balinese saka calendar1544–1545
Bengali calendar1030
Berber calendar2573
English Regnal year20 Ja. 1 – 21 Ja. 1
Buddhist calendar2167
Burmese calendar985
Byzantine calendar7131–7132
Chinese calendar壬戌(Water Dog)
4319 or 4259
    — to —
癸亥年 (Water Pig)
4320 or 4260
Coptic calendar1339–1340
Discordian calendar2789
Ethiopian calendar1615–1616
Hebrew calendar5383–5384
Hindu calendars
 - Vikram Samvat1679–1680
 - Shaka Samvat1544–1545
 - Kali Yuga4723–4724
Holocene calendar11623
Igbo calendar623–624
Iranian calendar1001–1002
Islamic calendar1032–1033
Japanese calendarGenna 9
(元和9年)
Javanese calendar1544–1545
Julian calendarGregorian minus 10 days
Korean calendar3956
Minguo calendar289 before ROC
民前289年
Nanakshahi calendar155
Thai solar calendar2165–2166
Tibetan calendar阳水狗年
(male Water-Dog)
1749 or 1368 or 596
    — to —
阴水猪年
(female Water-Pig)
1750 or 1369 or 597

Deaths

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