Year and a day

Year and a day can refer to:
 * The year and a day rule, a period tied into various legal principles in a number of jurisdictions
 * A Year and a Day (1998 novel), by Virginia Henley
 * A Year and a Day (2004 novel), by Leslie Pietrzyk (pub. William Morrow)
 * A Year and a Day (2006 novel), by Sara M. Harvey
 * A poem by Elizabeth Siddall
 * "Year and a Day", a song by the Beastie Boys
 * A Year and a Day, a 2005 film
 * A period used in handfastings – though more from the works of Sir Walter Scott than history
 * The time The Owl and the Pussycat sailed for in Edward Lear's poem of that name.
 * Long term assets are considered to be those held for a year and a day.
 * Pagans and secret societies often use a year and a day as a minimum period of initiation or between degrees of membership.
 * A Year and a Day, a 2008 mixtape by rapper T.I.

Note: a lunar year (13 lunar months of 28 days) plus a day is a solar year (365 days). Also that 366 days would be a full year even if a leap day was included.