On a Day: Music for Violin & Continuo (commonly referred to as: On a Day...) is the debut instrumental album by Emilie Autumn, released in 1997.

[1] Its title refers to both the Shakespeare song and the fact that the album took only a day to record.

[2] It consists of her performing works for the baroque violin accompanied by friends on the cello, harpsichord, and lute.

[3] Autumn did not initially intend to release the album, considering it "more of a demo despite its length", and released it after fans who enjoyed her "rock performances starting asking for a classical album so that they could hear more of the violin".

[2] The album was re-released digitally by Trisol Music Group in 2005.