This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)
Calendar Package
DayOfWeek day of the week for a given date
DaysPlus add a number of days to a given date
DaysBetween number of days between two dates
CalendarChange convert a date from one calendar to another
EasterSunday date of Easter Sunday for a given year
EasterSundayGreekOrthodox Easter Sunday according to the Greek Orthodox Church
JewishNewYear date of the Jewish New Year
DateQ whether a date is valid in the current calendar system
Sunday  ▪ Monday  ▪ Tuesday  ▪ Wednesday  ▪ Thursday  ▪ Friday  ▪ Saturday
Gregorian  ▪ Julian  ▪ Islamic  ▪ Jewish