Here are some of the books that were referenced to make The Encyclopedia of Days. Also used were a number of encyclopedias, calendars, and out-of-print books.
American Book of Days by Jane M. Hatch. Ancient Celtic Festivals And How We Celebrate Them by Clare Walker Leslie and Frank E. Gerace. Written with children in mind, yet packed with interesting information. Hardcover, 64 pages. The Celtic Druids' Year Seasonal Cycles of the Ancient Celts by John King. Paperback, 240 pages. Anniversaries and Holidays by Ruth Gregory. A Guide to World Fairs and Festivals by Frances Shemanski. The Golden Bough by Sir James Frazer. The Age of Faith The Story of Civilization by Will Durant. Caesar and Christ The Story of Civilization (No. 3) by Will Durant. A History of Roman Civilization and of Christianity from Their Beginnings to A.D. 325. Customs of Mankind by Lillian Eichler. The People's Almanac by David Wallechinsky and Irving Wallace. The Encyclopedia of Religion edited by Mircea Eliade. Dictionary of Saints by Alison Jones. Butler's Lives of the Saints by Alban Butler, and edited by Michael Walsh. Presents the life of one saint for each day of the year. How the Irish Saved Civilization The Untold Story of Ireland's Heroic Role from the Fall of Rome to the Rise of Medieval Europe by Thomas Cahill. Culture Shock! India by Gitanjali Kolandad.