Old Style and New Style dates
The text of "The Fortunate Isles" was published in quarto soon after its performance in 1625. The quarto is dated "1624," since prior to 1751 the English started the New Year on 25 March. [See: Old Style and New Style dates.] The masque was reprinted in the second folio collection of Jonson's works in 1641, and in subsequent editions of the collected works.