
30.05.1808, Lisbon - 28.12.1862,
Joaquim Casimiro Júnior (30 May 1808 in Lisbon – 28 December 1862) was a Portuguese composer and organist. He composed a number of operas and operettas, as well as much sacred music.

30.05.1874, Rostov-on-Don - 04.06.1967, Moscow
Elena Fabianovna Gnesina (sometimes transcribed Gnessina) (Russian Елена Фабиановна Гнесина) (30 May 1874 – 4 June 1967) was a Soviet and Russian composer and music educator, a sister of the composer Mikhail Gnesin. Gnesina was born in Rostov-on-Don to Rabbi Fabian Osipovich Gnesin (d. 1891) and his wife Bella Isaevna (née Fletzinger), who was a singer and pianist who had studied with Stanisław Moniuszko. She studied piano at the Moscow Conservatory under Vasily Safonov. She also had lessons from Ferruccio Busoni and Sergei Taneev. She graduated in 1893. In 1895 she established, with her sisters Evgenia and Maria, a private music school in Moscow, which became in 1926 the Gnesin State Musical College. Her students included the pianist Lev Oborin and the composer Aram Khachaturian. Amongst the teachers at the school were Mikhail Gnesin and Alexander Gretchaninov. She remained a senior administrator of the college until her death. Amongst her compositions are piano etudes and works for children, and textbooks on music. Gnesina's apartment, at ul. Povarskaya 30/36, Moscow, is maintained as a memorial museum to her. Gnesina received numerous state awards, including two Orders of Lenin, and recognition as an Honoured Artist of the RSFSR (1935). She died in Moscow in 1967 and is buried in the Novodevichy Cemetery.

30.05.1883, Borgo Sacco - 05.06.1944, Pesaro
Riccardo Zandonai (28 May 1883 – 5 June 1944) was an Italian composer and conductor. Rossini's La Gaza Ladra is a two act opera. Zandonai altered it into 3 acts. Your essay has it the other way around.

30.05.1883, Rovereto - 05.06.1944, Pesaro
Riccardo Zandonai (28 May 1883 – 5 June 1944) was an Italian composer and conductor. Rossini's La Gaza Ladra is a two act opera. Zandonai altered it into 3 acts. Your essay has it the other way around.
30.05.1887, Copenhagen - 27.03.1964,
Emil Reesen (30 May 1887 – 27 March 1964) was a Danish composer, conductor and pianist. Aside from composing for ballets and operas he was also a noted film score composer. He is remembered mainly for his operetta Farinelli (1942), which is still popular today.

30.05.1901, Illuka Rural Municipality - 13.04.1969, Tallinn
Alfred Karindi (born Alfred-Nikolai Karafin; 30 May 1901 – 13 April 1969) was an Estonian organist and composer.

30.05.1928, 's-Graveland - 16.01.2012, Amsterdam
Gustav Maria Leonhardt (30 May 1928 – 16 January 2012) was a Dutch keyboardist, conductor, musicologist, teacher and editor. He was a leading figure in the historically informed performance movement to perform music on period instruments. Leonhardt professionally played many instruments, including the harpsichord, pipe organ, claviorganum (a combination of harpsichord and organ), clavichord, fortepiano, and piano. He also conducted orchestras and choruses.

30.05.1928, Netherlands - 16.01.2012, Amsterdam
Gustav Maria Leonhardt (30 May 1928 – 16 January 2012) was a Dutch keyboardist, conductor, musicologist, teacher and editor. He was a leading figure in the historically informed performance movement to perform music on period instruments. Leonhardt professionally played many instruments, including the harpsichord, pipe organ, claviorganum (a combination of harpsichord and organ), clavichord, fortepiano, and piano. He also conducted orchestras and choruses.
30.05.1929, Częstochowa - 01.01.2019,
Bolesław Ocias (30 May 1929 – 16 June 2019) was a Polish conductor, composer and pedagog. His most important works include, among others: Concertino for piano and orchestra and Missa solemnis for choir and orchestra.

30.05.1952, Budapest - 06.11.2016, Budapest
Zoltán Kocsis (Hungarian: [ˈzoltaːn ˈkot͡ʃiʃ]; 30 May 1952 – 6 November 2016) was a Hungarian pianist, conductor and composer.
30.05.1954, Milan - ,
Marco Tutino (born 30 May 1954) is an Italian composer. His emergence during the late 1970s was as the spearhead of an Italian Neo-Romantico group, founded with two other composers, Lorenzo Ferrero and Carlo Galante. He graduated from the Milan Conservatory, where he had studied flute and composition (with Giacomo Manzoni), in 1982. He has composed operas, chamber music and symphonic works which have been performed by important Italian orchestras and concert societies. Some have been performed by music institutions in other countries, notably the BBC Philharmonic, The Berlin Radio Symphony Orchestra, Copenhagen Radio Symphony Orchestra, and The San Francisco Chamber Orchestra.

30.05.1971, Kielce - ,
Michał Jelonek (born 30 May 1971), also known as Jelonek, is a Polish musician and composer. He specializes in violin. He is a member of bands Hunter and Orkiestra Dni Naszych, and former member of Ankh. In 2007 Jelonek released his first, self-titled solo album.
30.05.1980, San Francisco - ,
Isaac Wardell is a record producer and composer who primarily writes sacred music. He is the director of The Porter's Gate Worship Project and the Director of Worship Arts at Restoration Anglican Church Arlington, Virginia.

30.05.1980, Hamilton - ,
Carly Paradis is a Canadian-born British composer, songwriter, and pianist. She composes soundtracks for movies, TV series and solo albums. In 2007, she worked with film composer Clint Mansell arranging piano parts on Mansell's soundtrack for the film Moon directed by Duncan Jones, and played all piano on the official score and soundtrack. As of 2022, Paradis has been playing keyboards for Nick Cave and the Bad Seeds.