May 1: The Great Exhibition of 1851 opens in London.
September 18: The New York Times publishes its first issue

1851 (MDCCCLI) was a common year starting on Wednesday of the Gregorian calendarand a common year starting on Monday of the Julian calendar, the 1851st year of the Common Era (CE) and Anno Domini (AD) designations, the 851st year of the 2ndmillennium, the 51st year of the 19thcentury, and the 2nd year of the 1850s decade. As of the start of 1851, the Gregorian calendar was 12days ahead of the Julian calendar, which remained in localized use until 1923.

Events

January – March

April – June

May 15: Rama IV is crowned as the King of Siam.

July – September

October – December

Ongoing

Births

January – June

Ella Giles Ruddy
Rose Coghlan, 1870s
Emile Berliner

July – December

Dora Montefiore

Deaths

January – June

Mary Shelley
Carl Gustav Jacob Jacobi

July – December

Louis Daguerre
Karl Drais

Date unknown