1904

From top to bottom, left to right:
  • The Russo-Japanese War begins as Japan’s surprise attack on Port Arthur signals its rise as a global power;
  • The 1904 Summer Olympics in St. Louis become the first Games held in the United States;
  • The Great Baltimore Fire devastates the city’s core, destroying over 1,500 buildings and prompting new firefighting standards;
  • The Kuta Reh massacre in Aceh sees hundreds of villagers killed by Dutch colonial forces during the Aceh War;
  • The Herero Wars in German South West Africa escalate into genocide against the Herero and Nama peoples;
  • The Dogger Bank incident sees Russian warships mistakenly fire on British fishermen, nearly triggering war.
1904 in various calendars
Gregorian calendar1904
MCMIV
Ab urbe condita2657
Armenian calendar1353
ԹՎ ՌՅԾԳ
Assyrian calendar6654
Baháʼí calendar60–61
Balinese saka calendar1825–1826
Bengali calendar1310–1311
Berber calendar2854
British Regnal year3 Edw. 7 – 4 Edw. 7
Buddhist calendar2448
Burmese calendar1266
Byzantine calendar7412–7413
Chinese calendar癸卯年 (Water Rabbit)
4601 or 4394
    — to —
甲辰年 (Wood Dragon)
4602 or 4395
Coptic calendar1620–1621
Discordian calendar3070
Ethiopian calendar1896–1897
Hebrew calendar5664–5665
Hindu calendars
 - Vikram Samvat1960–1961
 - Shaka Samvat1825–1826
 - Kali Yuga5004–5005
Holocene calendar11904
Igbo calendar904–905
Iranian calendar1282–1283
Islamic calendar1321–1322
Japanese calendarMeiji 37
(明治37年)
Javanese calendar1833–1834
Julian calendarGregorian minus 13 days
Korean calendar4237
Minguo calendar8 before ROC
民前8年
Nanakshahi calendar436
Thai solar calendar2446–2447
Tibetan calendarཆུ་མོ་ཡོས་ལོ་
(female Water-Hare)
2030 or 1649 or 877
    — to —
ཤིང་ཕོ་འབྲུག་ལོ་
(male Wood-Dragon)
2031 or 1650 or 878

1904 (MCMIV) was a leap year starting on Friday of the Gregorian calendar and a leap year starting on Thursday of the Julian calendar, the 1904th year of the Common Era (CE) and Anno Domini (AD) designations, the 904th year of the 2nd millennium, the 4th year of the 20th century, and the 5th year of the 1900s decade. As of the start of 1904, the Gregorian calendar was 13 days ahead of the Julian calendar, which remained in localized use until 1923.