As of the start of 1840, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.

Discover what happened in this year with HISTORY’s summaries of major events, anniversaries, famous births and notable deaths. During an exploring expedition, Captain Charles Wilkes …

Historical events from year 1840. Learn about 47 famous, scandalous and important events that happened in 1840 or search by date or keyword.

December 2, 1840 - President Martin Van Buren is defeated for reelection by William Henry Harrison. Harrison, a Whig, receives 234 Electoral College votes to 60 and also wins the …

Jul 2, 2025 · This article will analyze the key events of 1840, focusing on their long-term impact and contextualizing them within the broader narrative of 19th-century American development.

Migration and immigration during the 1840s significantly altered both social and political dynamics in the United States. The influx of diverse immigrant groups enriched American culture but …

Over the twenty years between 1820 and 1840 the daily lives of most Americans have improved steadily, with the exceptions of those enslaved in the South and the dispossessed native …

The 1840 Presidential Election in the United States represented a major shift in political campaigns. Whig Party candidate William Henry Harrison and his running mate, John Tyler, …

Jun 18, 2025 · Discover 30 fascinating facts about the year 1840, from historical events to cultural milestones that shaped the world. Dive into history now!

November 4 – 1840 United States presidential election: William Henry Harrison defeats Martin Van Buren in a landslide. December 7 – David Livingstone leaves Britain for Africa.