jdtogregorian
gregoriantojd
jdtojulian
juliantojd
jdtojewish
jewishtojd
jdtofrench
frenchtojd
jddayofweek

jdmonthname
easter_date
easter_days
unixtojd
jdtounix
cal_to_jd
cal_from_jd
cal_days_in_month
cal_info