1623

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.

1623 in other calendars

Gregorian calendar	1623 MDCXXIII
Ab urbe condita	2376
Armenian calendar	1072 ԹՎ ՌՀԲ
Assyrian calendar	6373
Balinese saka calendar	1544–1545
Bengali calendar	1030
Berber calendar	2573
English Regnal year	20 Ja. 1 – 21 Ja. 1
Buddhist calendar	2167
Burmese calendar	985
Byzantine calendar	7131–7132
Chinese calendar	壬戌年 (Water Dog) 4319 or 4259     — to — 癸亥年 (Water Pig) 4320 or 4260
Coptic calendar	1339–1340
Discordian calendar	2789
Ethiopian calendar	1615–1616
Hebrew calendar	5383–5384
Hindu calendars
- Vikram Samvat	1679–1680
- Shaka Samvat	1544–1545
- Kali Yuga	4723–4724
Holocene calendar	11623
Igbo calendar	623–624
Iranian calendar	1001–1002
Islamic calendar	1032–1033
Japanese calendar	Genna 9 (元和９年)
Javanese calendar	1544–1545
Julian calendar	Gregorian minus 10 days
Korean calendar	3956
Minguo calendar	289 before ROC 民前289年
Nanakshahi calendar	155
Thai solar calendar	2165–2166
Tibetan calendar	ཆུ་ཕོ་ཁྱི་ལོ་ (male Water-Dog) 1749 or 1368 or 596     — to — ཆུ་མོ་ཕག་ལོ་ (female Water-Boar) 1750 or 1369 or 597

Deaths

• February 8 – Thomas Cecil, 1st Earl of Exeter, English politician (b. 1546)
• March 19 – Uesugi Kagekatsu, Japanese samurai and warlord (b. 1556)
• June 16 – Christian, Duke of Brunswick-Lüneburg-Wolfenbüttel, German Protestant military leader (b. 1599)
• July 4 – William Byrd, English composer
• July 8 – Pope Gregory XV (b. 1554)
• October 21 – William Waad, English statesman and diplomat (b. 1546)
• November 9 – William Camden, English historian (b. 1551)
• November 11 – Philippe de Mornay, French writer (b. 1549)
• November 12 – Josaphat Kuncevyc, Lithuanian archbishop
• Andrea Andreani, Italian engraver (b. 1540)