Browse free open source Date Calculators and projects below. Use the toggles on the left to filter open source Date Calculators by OS, license, language, programming language, and project status.

  • Business Continuity Solutions | ConnectWise BCDR Icon
    Business Continuity Solutions | ConnectWise BCDR

    Build a foundation for data security and disaster recovery to fit your clients’ needs no matter the budget.

    Whether natural disaster, cyberattack, or plain-old human error, data can disappear in the blink of an eye. ConnectWise BCDR (formerly Recover) delivers reliable and secure backup and disaster recovery backed by powerful automation and a 24/7 NOC to get your clients back to work in minutes, not days.
  • Cyber Risk Assessment and Management Platform Icon
    Cyber Risk Assessment and Management Platform

    ConnectWise Identify is a powerful cybersecurity risk assessment platform offering strategic cybersecurity assessments and recommendations.

    When it comes to cybersecurity, what your clients don’t know can really hurt them. And believe it or not, keep them safe starts with asking questions. With ConnectWise Identify Assessment, get access to risk assessment backed by the NIST Cybersecurity Framework to uncover risks across your client’s entire business, not just their networks. With a clearly defined, easy-to-read risk report in hand, you can start having meaningful security conversations that can get you on the path of keeping your clients protected from every angle. Choose from two assessment levels to cover every client’s need, from the Essentials to cover the basics to our Comprehensive Assessment to dive deeper to uncover additional risks. Our intuitive heat map shows you your client’s overall risk level and priority to address risks based on probability and financial impact. Each report includes remediation recommendations to help you create a revenue-generating action plan.
  • 1
    Osmo
    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.
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    Downloads: 39 This Week
    Last Update:
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  • 2
    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 ...
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    Downloads: 8 This Week
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  • 3
    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.
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    Downloads: 7 This Week
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  • 4
    Speed3

    Speed3

    Maritime calculator. ETA, Speed, Slip, Distance e.t.c.

    Maritime calculator. Calculate ETA, Required Speed and R.P.M. Supposed, Passing and Average Slip, Course and Distance. Weighted average calculator. Calculate Date plus or minus Days and Time periods. Difference between dates. Timer and Stopwatch.
    Downloads: 2 This Week
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  • Manage your IT department more effectively Icon
    Manage your IT department more effectively

    Streamline your business from end to end with ConnectWise PSA

    ConnectWise PSA (formerly Manage) allows you to stop working in separate systems, and helps you build a more profitable business. No more duplicate data entries, inefficient employees, manual invoices, and the inability to accurately track client service issues. Get a behind the scenes look into the award-winning PSA that automates processes for each area of business: sales, help desk, support, finance, and HR.
  • 5

    Perfect Age Calculator

    Pefect Age Calculator Tool

    Perfect Age calculator is a free-ware tool to calculate age by a given date of birth. It tells age in years and also includes the months in the result box so that you will know when your next birthday is. This tool is very useful for official use like office, schools, institutes etc.
    Downloads: 1 This Week
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  • 6
    UltimateCalculator

    UltimateCalculator

    Basic Scientific Calculator

    This software has four major modes- Simple, Scientific, Base & Equation. It also has Unit Converter, Date Calculator & Prime Number Generator.
    Downloads: 1 This Week
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  • 7

    Age Calculator

    Calculates your age in days and logs it.

    This program is written in CSharp by B.J.Erasmus. It calculates the days from your birth date to current date. NOTE: Create "Log.txt" in the same directory the Exe is placed.
    Downloads: 0 This Week
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  • 8
    Age Calculator For Android

    Age Calculator For Android

    It's an age calculation application with respect to current date.

    ->Give input your birth date,month,year. ->It will tell your age in year , month , date format. ->Here the bugs are solve effectively. ->enjoy this app and more new apps are coming soon.
    Downloads: 0 This Week
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  • 9
    Simple Android Date Calculator
    Downloads: 0 This Week
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  • Finance Automation that puts you in charge Icon
    Finance Automation that puts you in charge

    Tipalti delivers smart payables that elevate modern business.

    Our robust pre-built connectors and our no-code, drag-and-drop interface makes it easy and fast to automatically sync vendors, invoices, and invoice payment data between Tipalti and your ERP or accounting software.
  • 10
    The Assignment Calculator breaks down research and writing projects into manageable steps based on your due date. Each step includes hints and "how-to" links to additional resources. You can also email or print a reminder outlining each step.
    Downloads: 0 This Week
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  • 11
    Breaks down the research process into pre-defined steps. Users enter a start date and end date for an assignment and the Assignment Calculator will compute the dates s/he needs to complete each step. Written by the University of Minnesota Libraries.
    Downloads: 0 This Week
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  • 12

    Calcu-Age

    Command line age calculator

    Enter your age in the desired format. It will show your age in years, months, days, weeks, hours, minutes, seconds and milliseconds according to the system's date and time. The code is available in Python.
    Downloads: 0 This Week
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  • 13
    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
    Downloads: 0 This Week
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  • 14
    With this application you will know, instantly the time difference between two dates in the form of date, days, hours, minutes, and seconds!
    Downloads: 0 This Week
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  • 15
    A calculator for dates. May calculate how many days there are between two dates or the next date from a starting date. Runs on Palm Os and Windows.
    Downloads: 0 This Week
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  • 16
    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.
    Downloads: 0 This Week
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  • 17
    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.
    Downloads: 0 This Week
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  • 18
    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.
    Downloads: 0 This Week
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  • 19

    ObjectLab Kit

    We MOVED to GITHUB!

    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
    Downloads: 0 This Week
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  • 20
    Programmable Calendric Calculator

    Programmable Calendric Calculator

    Convert between calendars and work with date ranges.

    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.
    Downloads: 0 This Week
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  • 21

    Time and Date Calculator

    Simple calculator that can handle dates and time.

    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
    Downloads: 0 This Week
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  • 22
    VremyaMetr - a tool to measure time and study it's laws. Remind about events + Date calculator + Work with periods + Create table + Kalachakra.
    Downloads: 0 This Week
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  • 23
    Working Days Calculator

    Working Days Calculator

    A small calculator to leave out holidays in a period of time

    Working Days Calculator is a Windows desktop tool that calculates the number of working days between two dates in Belgium or the Netherlands, leaving out Sundays and holidays. The tool also provides the possibility to compute the total cost of the result. So you don't need to open a seperate calculator to compute it. It's primarily intended for people working in the newspaper industry, as most newspapers are printed on a daily basis, except on Sundays or official holidays. The size of the program is comparable to that of Calculator, included in all versions of Windows. It's written in C#. The UI is in WinForms. The targetted framework is .NET 3.5, so you can use it on Windows XP and higher.
    Downloads: 0 This Week
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  • 24
    date calculator
    This program calculates the days, months and years between two dates. This is a console based version compiled for windows. GUI version and linux compatibility soon!
    Downloads: 0 This Week
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  • 25
    Two full-fledged object-oriented classes dealing with dates (class cDate) and spans of time (class cPeriod) written in C++. The datecalc-cpp project is a sub-project of tbvs-hr (https://sourceforge.net/projects/tbvs-hr).
    Downloads: 0 This Week
    Last Update:
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Open Source Date Calculators Guide

Open source date calculators are programs that enable users to calculate differences between dates. The term "open source" refers to software code which is made available with a free license, making it public and accessible for anyone to modify or redistribute. This type of calculators is often used in applications such as calendar events, personal finances, project management, time clocks and more.

The open source date calculator can be used for several purposes. For instance, it allows users to determine the number of days between two dates by subtracting one from the other. It can also be used to figure out how many hours, minutes or seconds there are between two different dates or times. Additionally, this tool can help you locate a specific day within a given range of dates or show you the duration of any event that happens over multiple days.

When using an open source date calculator, one can customize their inputs as needed. They can also adjust options like working hours per day and weekends when calculating business days or setting up deadlines for projects. Furthermore, they have access to various functions such as averaging out days across weeks and months; returning information about a particular week number; displaying relative timestamps from now; counting down from any given date; determining whether a particular year is leap year; and so much more.

Overall, having access to an open source date calculator provides numerous advantages for user convenience in managing tasks where time plays an important role and prevents potential mistakes in calculations due to manual data input errors. With its many features designed for quick calculation results at anytime and anywhere, this tool remains highly popular among developers looking for reliable solutions in their daily tasks which involve complex calculations involving dates.

Features of Open Source Date Calculators

  • Programmable Time Zone Conversion: Open source date calculators often provide a feature that allows users to convert times between multiple time zones. This is convenient when planning events across different locations, as it helps ensure everyone will be on the same page in terms of start and end times.
  • Date Math & Arithmetic Calculations: Many open source date calculators allow users to perform mathematical operations on dates and perform calculations such as adding or subtracting any amount of days, weeks, months, or years from a given date. This provides an easy way to calculate future or past dates/times based on current timeframes.
  • Customization Options: Open source date calculators commonly provide customization options where user-defined formats can be used for output display in calendars or clocks. This allows users to adjust settings for calendar appearance such as selecting colors for weekends and holidays, changing font size and typeface, turning off daylight saving time etc.
  • Age Calculator: An age calculator option is also typically included in open source date calculators which can help calculate a person’s exact age down to the day by entering their birthdate into the system. This could come in useful for applications such as authentication or other legal processes that require being able to accurately pinpoint a person's specific age.
  • Output Options & Report Generation: Open source date calculators may include options such as customizing how calendar output is displayed and/or generating reports with various details (including conversions between civil and ISO8601 commercial calendars). Being able to generate easily readable reports provides an effective way to share information quickly without having to manually copy data into spreadsheets etc.

Different Types of Open Source Date Calculators

  • Date Calculator - A date calculator will help you to work out the difference between two dates, or calculate a date that is a certain amount of days in the future or past. It can be used to plan events, count down to an important day, find out when a person’s birthday is, and more.
  • Age Calculator - An age calculator can calculate how old someone would have been at any point in time by entering their birthdate and current date. This could be used to answer questions like "How old was I on my first birthday?" or "How old was my mother when I was born?"
  • Countdown Timer - A countdown timer allows you to set a period of time for counting down from and receive notifications when it reaches zero. Many open source countdown timers are available for both desktop applications and web browsers, making them useful for internet-based tasks such as online auctions.
  • Calendar Generator - A calendar generator creates visually appealing calendars in printable format using images and text. Calendars can be customized with holidays, special events, or user-defined dates of interest such as birthdays or anniversaries.<br><br> Event Scheduler - An event scheduler helps people create detailed timelines and schedules for events by providing various methods of organizing information into easily readable formats. Event schedulers often include features like “drag & drop” functionality so users can quickly change arrangements around if needed.

Open Source Date Calculators Advantages

  1. Cost Savings: Many open source date calculators are freely available, allowing organizations to save on the cost of purchasing software licenses. This can be especially beneficial for small businesses or those with limited budgets.
  2. Customizable: Open source date calculators often provide users with the ability to customize their own calculator, allowing for greater flexibility when calculating dates and times.
  3. Automated Calculation: Open source date calculators typically come with automated calculation features, eliminating the need for manual calculations.
  4. Compatibility: Open source date calculators are usually compatible with multiple operating systems, meaning they can be used across platforms without any issues.
  5. Easy to Use Interface: Most open source date calculators have user-friendly interfaces that make it easy to use even if you’re not familiar with complex software applications.

What Types of Users Use Open Source Date Calculators?

  • Hobbyists: Individuals who use open source date calculators for personal projects or to learn more about the field of computing.
  • Developers: Professionals who use open source date calculators to develop applications and websites, often with specialized tools like scripting languages.
  • Companies: Organizations that use open source date calculators to manage online services or develop back-end components for their systems.
  • Researchers: Academics and students who use open source date calculators to study topics like statistics, business intelligence, data mining, and machine learning.
  • Government Agencies: National and local agencies that need accurate calculations for legal documents, taxes, permits, and records.
  • Schools & Universities: Educational institutions that rely on these date calculation tools in classrooms and research labs to help teach students programming fundamentals.
  • System Administrators: IT professionals responsible for maintaining system security through regular backups, patching operations, and other maintenance tasks that require precise timestamps.

How Much Do Open Source Date Calculators Cost?

Open source date calculators are free to use and do not require any payment. The difference between open source and closed source software is that with open source, anyone can view, modify, and distribute the code used to create the software. This means that there are no licensing costs associated with using an open source date calculator. Furthermore, open source coders may also provide support for their software at no charge. With so many resources available online such as discussion boards, tutorials, and a wide variety of code examples created by developers who have successfully implemented the same functionalities before you can get started quickly and easily building your own version of a date calculator in a fraction of the time it would take using commercial solutions. By taking advantage of existing tools, libraries, frameworks etc., you can save considerable amounts of money developing your own custom solution without having to worry about buying expensive software licenses or subscriptions demand from vendors.

What Software Can Integrate With Open Source Date Calculators?

Open source date calculators can be integrated with various types of software that allow users to generate graphs, reports, or visual representations of data. The integration allows users to quickly access their project's timeline and make adjustments accordingly. Other types of software that may integrate with open source date calculators include project management applications, spreadsheets, and task scheduling/tracking systems. By using such integrations, organizations are able to have a visual representation and a single place for managing all aspects of the project timeline. Additionally, some larger scale project management software programs can also use open source date calculators as part of their core functionality by providing analytical tools that analyze the effectiveness of any given decisions made during the process.

What Are the Trends Relating to Open Source Date Calculators?

  1. Increased Popularity: In recent years, open source date calculators have become increasingly popular. This is due to the fact that they are often more reliable and customizable than traditional ones, and offer additional features such as calendar integration and time conversion.
  2. More Flexibility: Open source date calculators provide users with greater flexibility than their closed-source counterparts. For example, they can easily be extended or customized to fit specific needs, allowing users to tailor the tool to their particular use case.
  3. Cost Savings: Since open source date calculators are usually free or low-cost, they can be a great money-saving option for businesses or individuals looking for a reliable tool. Additionally, the lack of licensing fees makes them an attractive option for organizations with limited budgets.
  4. Security Benefits: Open source date calculators are generally more secure than their closed-source counterparts. This is because open source code is accessible for review and auditing by anyone, making it easier to identify potential security issues and ensure that the code is up-to-date with the latest security standards.
  5. Improved Accessibility: Open source date calculators are often available in multiple languages, making them more accessible to a wider range of users who may not speak English as their first language. Additionally, they may be compatible with different operating systems and devices, further increasing their reach across the globe.

How To Get Started With Open Source Date Calculators

  1. Getting started with open source date calculators is easy. All you need to do is find a calculator that works for your needs and download the software. You can usually find these open source date calculators online, either on their own websites or from popular software repositories like GitHub.
  2. Once you’ve downloaded the software, you’ll be able to install it on your computer and begin using it right away. Most of these open source date calculators are user friendly and come with helpful instructions that explain how to set up and use them correctly. They also often come with sample data files so users can practice running calculations without needing to input real-world dates or times into the program.
  3. If you want more advanced features, many of these open source date calculators offer additional modules or plugins that enable access to additional functions like calendar views, scheduling programs, time tracking tools, etc. You may be able to download these extra features for free in some cases; otherwise they will likely require a one-time fee or subscription-based payment option depending on the provider.
  4. Finally, if there are any issues using the calculator or problems understanding how it works, most providers have user forums and documentation available where users can get help from members of their development community as well as from technical support staff from the provider itself. This makes learning how to use an open source date calculator much easier than trying to figure things out on your own.