Buchanan, Colin. Historical Dictionary of Anglicanism. Scarecrow Press, 27 February 2006. ISBN 978-0-8108-6506-8. с. 182. In the 1662 Book of Common Prayer, there is a list of "Days of Fasting, or Abstinence", consisting of the 40 days of Lent, the ember days, the three rogation days (the Monday to Wednesday following the Sunday after Ascension Day), and all Fridays in the year (except Christmas, if it falls on a Friday).
