"ග්‍රෙගරි දින දසුන" හි සංශෝධන අතර වෙනස්කම්

* [[Doomsday rule]]

 

* Blackburn, B. & Holford-Strevens, L. (1999). ''The Oxford Companion to the Year''. Oxford University Press ISBN 0-19-214231-3. Pages 98-99.

* Coyne, G. V., Hoskin, M. A., and Pedersen, O.(Eds.) (1983). ''[http://articles.adsabs.harvard.edu//full/book/grc../1983//0000001,001.html Gregorian reform of the calendar: Proceedings of the Vatican conference to commemorate its 400th anniversary, 1582-1982]''. Vatican City: Pontifical Academy of Sciences, Specolo Vaticano.