1603 (MDCIII) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Saturday of the Julian calendar, the 1603rd year of the Common Era (CE) and Anno Domini (AD) designations, the 603rd year of the 2nd millennium, the 3rd year of the 17th century, and the 4th year of the 1600s decade. As of the start of 1603, 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: 1570s  1580s  1590s  – 1600s –  1610s  1620s  1630s
Years: 1600 1601 160216031604 1605 1606
1603 in other calendars
Gregorian calendar1603
MDCIII
Ab urbe condita2356
Armenian calendar1052
ԹՎ ՌԾԲ
Assyrian calendar6353
Balinese saka calendar1524–1525
Bengali calendar1010
Berber calendar2553
English Regnal year45 Eliz. 1 – 1 Ja. 1
Buddhist calendar2147
Burmese calendar965
Byzantine calendar7111–7112
Chinese calendar壬寅(Water Tiger)
4299 or 4239
    — to —
癸卯年 (Water Rabbit)
4300 or 4240
Coptic calendar1319–1320
Discordian calendar2769
Ethiopian calendar1595–1596
Hebrew calendar5363–5364
Hindu calendars
 - Vikram Samvat1659–1660
 - Shaka Samvat1524–1525
 - Kali Yuga4703–4704
Holocene calendar11603
Igbo calendar603–604
Iranian calendar981–982
Islamic calendar1011–1012
Japanese calendarKeichō 8
(慶長8年)
Javanese calendar1523–1524
Julian calendarGregorian minus 10 days
Korean calendar3936
Minguo calendar309 before ROC
民前309年
Nanakshahi calendar135
Thai solar calendar2145–2146
Tibetan calendar阳水虎年
(male Water-Tiger)
1729 or 1348 or 576
    — to —
阴水兔年
(female Water-Rabbit)
1730 or 1349 or 577

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Deaths

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