Births on January 21

Henri Duparc, French soldier and composer (d. 1933)

Eugène Marie Henri Fouques Duparc (21 January 1848 – 12 February 1933) was a French composer of the late Romantic period.

3 May

Benty Grange helmet
The boar-crested Anglo-Saxon Benty Grange helmet is discovered.
15 May

1848 revolutions
Serfdom is abolished in the Habsburg Galicia, as a result of the 1848 revolutions. The rest of monarchy followed later in the year.
18 May

Frankfurt Parliament
Opening of the first German National Assembly (Nationalversammlung) in Frankfurt, Germany.
19 Jul

Seneca Falls Convention
Women's rights: A two-day Women's Rights Convention opens in Seneca Falls, New York.
29 Sep

Hungarian Revolution of 1848
Battle of Pákozd: Stalemate between Hungarian and Croatian forces at Pákozd; the first battle of the Hungarian Revolution of 1848.