The four periods of the legal year during which the full range of judicial business is transacted in the Supreme Court. The sittings are Michaelmas, Hilary, Easter, and Trinity. Sittings were substituted for terms by the Judicature Act 1873. The dates of the sittings of the Court of Appeal and the High Court are set out in a Practice Direction to Part 39 of the Civil Procedure Rules. See also vacations.