Dies Natalis (Latin: "Natal Day" or "Day of Birth"), Op. 8, is a five-movement solo cantata composed in 1938–1939 by the twentieth-century English composer Gerald Finzi (1901–1956). It is a solo vocal cantata scored for a solo soprano or tenor accompanied by string orchestra, and features settings of four texts by Thomas Traherne (1636/37–1674), a seventeenth-century English Metaphysical poet, priest and theologian.