1840s Synonyms

1820s the 40s of the 19th century the 30s of the 19th century the 20s of the 19th century the 10s of the 19th century middle of the 19th century mid-19th century late 19th century late 1800s first half of the 19th century early 19th century early 1800s half of the nineteenth century 1810s 1800s 1850s 1830s the 50s of the 19th century