1928

From top to bottom, left to right: The discovery of penicillin by Alexander Fleming revolutionizes medicine as the first true antibiotic; the Kellogg–Briand Pact sees major powers renounce war as national policy, reflecting interwar idealism; the 1928 Summer Olympics in Amsterdam mark the first women’s track and field events; the Huanggutun incident assassinates warlord Zhang Zuolin, aiding Nationalist consolidation in China; the 1928 Okeechobee hurricane kills thousands in Florida and the Caribbean; and Steamboat Willie debuts Mickey Mouse, launching a new era in animation and pop culture.
1928 in various calendars
Gregorian calendar1928
MCMXXVIII
Ab urbe condita2681
Armenian calendar1377
ԹՎ ՌՅՀԷ
Assyrian calendar6678
Baháʼí calendar84–85
Balinese saka calendar1849–1850
Bengali calendar1334–1335
Berber calendar2878
British Regnal year18 Geo. 5 – 19 Geo. 5
Buddhist calendar2472
Burmese calendar1290
Byzantine calendar7436–7437
Chinese calendar丁卯年 (Fire Rabbit)
4625 or 4418
    — to —
戊辰年 (Earth Dragon)
4626 or 4419
Coptic calendar1644–1645
Discordian calendar3094
Ethiopian calendar1920–1921
Hebrew calendar5688–5689
Hindu calendars
 - Vikram Samvat1984–1985
 - Shaka Samvat1849–1850
 - Kali Yuga5028–5029
Holocene calendar11928
Igbo calendar928–929
Iranian calendar1306–1307
Islamic calendar1346–1347
Japanese calendarShōwa 3
(昭和3年)
Javanese calendar1858–1859
Juche calendar17
Julian calendarGregorian minus 13 days
Korean calendar4261
Minguo calendarROC 17
民國17年
Nanakshahi calendar460
Thai solar calendar2470–2471
Tibetan calendarམེ་མོ་ཡོས་ལོ་
(female Fire-Hare)
2054 or 1673 or 901
    — to —
ས་ཕོ་འབྲུག་ལོ་
(male Earth-Dragon)
2055 or 1674 or 902

1928 (MCMXXVIII) was a leap year starting on Sunday of the Gregorian calendar, the 1928th year of the Common Era (CE) and Anno Domini (AD) designations, the 928th year of the 2nd millennium, the 28th year of the 20th century, and the 9th year of the 1920s decade.