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.

Date and Time Calculator will let you easily add and subtract dates and time intervals. It features common date-related calculations, detailed date information, moon phase information, birth date calculator, due date calculator, and much more!

Local time and date for any locations on Earth, 12 calendars, holidays and memorial days of many countries and religions, Sun, Moon, and Planets (coordinates and time of rise/transit/set), vernal/autumnal equinox/solstice, solar and lunar eclipses.

Organize Photos by Date - the best way to do it is to organize photos by date using this award-winning software. The tool is designed to organize photos by date and other parameters and to organize photos by date in any place.

Magic Date Picker is a very easy-to-use utility for changing the date on your computer. It might come in handy when you are using a time-limited demo of a shareware program that checks computer date.

Date / Date Range picker. Convenient way to input period of dates

Local time for any locations on Earth; calendars, holidays and memorial days of many countries and religions; coordinates and time of rise, transit and set of the Sun, the Moon, and Planets; equinoxes and solstices; solar and lunar eclipses.