Millennium: 2nd millennium
1905 in various calendars
Gregorian calendar1905
Ab urbe condita2658
Armenian calendar1354
Assyrian calendar6655
Bahá'í calendar61–62
Balinese saka calendar1826–1827
Bengali calendar1312
Berber calendar2855
British Regnal yearEdw. 7 – 5 Edw. 7
Buddhist calendar2449
Burmese calendar1267
Byzantine calendar7413–7414
Chinese calendar甲辰(Wood Dragon)
4601 or 4541
    — to —
乙巳年 (Wood Snake)
4602 or 4542
Coptic calendar1621–1622
Discordian calendar3071
Ethiopian calendar1897–1898
Hebrew calendar5665–5666
Hindu calendars
 - Vikram Samvat1961–1962
 - Shaka Samvat1826–1827
 - Kali Yuga5005–5006
Holocene calendar11905
Igbo calendar905–906
Iranian calendar1283–1284
Islamic calendar1322–1323
Japanese calendarMeiji 38
Javanese calendar1834–1835
Julian calendarGregorian minus 13 days
Korean calendar4238
Minguo calendar7 before ROC
Nanakshahi calendar437
Thai solar calendar2447–2448
Tibetan calendar阳木龙年
(male Wood-Dragon)
2031 or 1650 or 878
    — to —
(female Wood-Snake)
2032 or 1651 or 879

1905 (MCMV) was a common year starting on Sunday of the Gregorian calendar and a common year starting on Saturday of the Julian calendar, the 1905th year of the Common Era (CE) and Anno Domini (AD) designations, the 905th year of the 2nd millennium, the 5th year of the 20th century, and the 6th year of the 1900s decade. As of the start of 1905, the Gregorian calendar was 13 days ahead of the Julian calendar, which remained in localized use until 1923.

As the second year of the massive Russo-Japanese War begins, more than 100,000 die in the largest world battles of that era, and the war chaos leads to the 1905 Russian Revolution against Nicholas II of Russia (Shostakovich's 11th Symphony is subtitled The Year 1905 to commemorate this) and the start of Revolution in the Kingdom of Poland. Canada and the U.S. expand west, with the Alberta and Saskatchewan provinces and the founding of Las Vegas. 1905 is also the year in which Albert Einstein, at this time resident in Bern, publishes his four Annus Mirabilis papers in Annalen der Physik (Leipzig) (March 18, May 11, June 30 and September 27), laying the foundations for more than a century's study of theoretical physics.


"Baby New Year", a cartoon by John T. McCutcheon depicting the new year 1905 chasing the old 1904 into the history books
1905: Einstein's "miracle year"


January 22 (9 O.S.): The Bloody Sunday massacre of Russian demonstrators at the Winter Palace in Saint Petersburg