@article{10.2307/23262894,
 ISSN = {00410608},
 URL = {http://www.jstor.org/stable/23262894},
 author = {J. Jean Ajdler},
 journal = {Tradition: A Journal of Orthodox Jewish Thought},
 number = {4},
 pages = {3--28},
 publisher = {Rabbinical Council of America (RCA)},
 title = {Rav Safra and the Second Festival Day: Lessons About the Evolution of the Jewish Calendar},
 volume = {38},
 year = {2004}
}