Does date arithmetic (adds a number of days to a date and calculates the number of days between two dates) and converts among Gregorian dates, Julian dates, Annus Novus dates, Julian day numbers and day-in-year dates of the form yyyyddd.
TrayDay: today's date at a glance, in the Windows tray, with handy popup calendar. Can show week numbers to ISO (or your own) standard. A double-click types the date in the format of your choice. Julian Day and Internet Time features.
Add, minus, divide and multiply time values in hours, minutes and seconds. Convert from fractional values and vice-versa. Use the DAE (date analysis engine) to find the day of any date in the Gregorian calendar within a range of up to 15 centuries.
