Redigerer Den julianske kalenderen (avsnitt)

== Litteratur ==
* Blackburn, Bonnie; Holford-Strevens, Leofranc (2003): ''The Oxford Companion to the Year'', Oxford University Press, nytrykk med rettelser.
* Brind'Amour, Pierre (1983): ''Le Calendrier romain: Recherches chronologiques''. Ottawa University Press.
* Feeney, Dennis (2007): ''Caesar's Calendar: Ancient Time and the Beginnings of History''. Berkeley: University of California Press.
* Rüpke, Jörg (2011): ''The Roman Calendar from Numa to Constantine: Time, History and the Fasti''. Wiley.
* Richards, E. G (1998): ''Mapping time: the calendar and its history''. Oxford University Press. ISBN 978-0-19-286205-1.
* Richards, E. G. (2013): ''Explanatory Supplement to the Astronomical Almanac'', 3. utg. Mill Valley, Calif: University Science Books. ISBN 978-1-891389-85-6.
* Stern, Sacha (2012): ''Calendars in Antiquity: Empires, States and Societies''. Oxford University Press.