Appendix D

Appendix D is the fourth Appendix to The Lord of the Rings and is entitled Calendars. In it, Tolkien outlines the various calendar systems used in Middle-earth. These include the Shire Calendar, the Calendar of Imladris (or Reckoning of Rivendell), and the Númenorean systems of the King's Reckoning and the Stewards' Reckoning.

Special prominence is given to the Shire Calendar, for which a complete table of the days and months of the year is provided.

This Appendix also gives the names of the seasons, months, and days of the week in Quenya and Sindarin and the names of the months and days of the week according to the Shire Calendar.