Open Source BSD Date Calculators

Osmo is a handy personal organizer, which includes calendar, tasks manager, address book and notes modules. It was designed to be a small, easy to use and good looking PIM tool to help to manage personal information.

A simple command to convert calendar dates to julian dates. Quite useful in timing situations where you need elapsed time between dates. Also useful for astronomy applications.

NOTE: Moved to https://github.com/vapier/pcalc Pcalc is a command line calculator handling HEX DEC OCT BIN. It can process a script, save variables to file, full math parser, parentheses, exponential, sin/cos, sqrt, date, inch/mm celsius/f, compound expressions ...

Canyon is a date calculator utility that aims to provide handy methods to perform arithmetic calculations on java.util.Date objects. Developers are free to plug in their own localized instances of java.util.Calendar or to use the default GregorianCalenda

Joda-time based utility Java class that allows calculation related to downtimes. You set a list of downtimes (date-time intervals), and the calculator will give you the ending date-time of a duration, and uptime between two points in time, too.

Easter Calculator for Mobile Phone J2ME compliant. You can calculate the date for several years or you can verify if one date is an Easter holiday or not.

End of Day Daily Tracking Calculator. A quick and dirty text based calculator designed to give you week to date sales, labor cost, inventory over/shortage and ext.

http://github.com/Appendium/objectlabkit A set of modules to handle common financial functions. The first module is Date Calculator which handles holidays and weekends. A set of rules are implemented to deal with days falling on a holiday: Forward, Backward, Modified Forward, Modified Backward New FX Rate Calculators

This calculator will allow you to convert between many different world calendar schemes and calculate ranges and ages based on these calendars. The calculator also has a script language that allows you to create variations of the built-in calendars: calendars that shift the new year to a different day, hybrid calendars that switch between schemes, local observational calendars that depend on a particular location, year counts that change for specific eras (regnal calendars) and calendars that require adjustment due to subtle differences in calculation.

Goal of this project is, creating a calculator that can handle all date and time operations that a user may need. You can operate with milliseconds as months, years or dates. Examples: 2013-11-25 + 3d => 2013-11-28 2013-11-25 - 2013-10-20 => 36d 1h 5h + 6h => 11h 1382220000t => 2013-10-20

etm provides an intuitive format for using plain text files to store data, a command line interface for viewing data in a variety of convenient ways and a GUI interface for both viewing and modifying data. Repetition and alerts are supported .