- 3 April 1925 – Jean de Reszke (pictured), one of the most prominent tenors of the late 19th century, died in Nice at the age of 75.
- 12 April 2008 – The Oslo Opera House was officially inaugurated by King Harald V of Norway.
- 13 April 1845 – Richard Wagner completed the full score of Tannhäuser.
- 14 April 1759 – The Baroque composer George Frideric Handel famous for his operas, oratorios, and concerti grossi died in London at the age of 74.
- 21 April 1889 – Puccini's second opera, Edgar, had its world premiere at La Scala.
- 23 April 1857 – Ruggero Leoncavallo, the composer of Pagliacci was born in Naples.
- 26 April 1951 - Ralph Vaughan Williams' opera The Pilgrim's Progress had its world premiere in London with Inia Te Wiata as John Bunyan.
- 29 April 1774 – Austrian soprano Anna Gottlieb, the first Pamina in Mozart's The Magic Flute, was born in Vienna.