Date Time Calc is an application to calculate future and past dates adding a date interval and to calculate date difference between two assigned date.
It is realized for business and technical user who are in need of calculation of date in a bullet proof way.
Simply and natural as any application has to be, you will be amazed using it!


• Calculate future date adding 150 days from today
• Calculate the difference in years, months, days between 25 March 2009 and today
• Calculate precise time difference between previous Monday at 09:55:30 and next Friday at 11:07:15
• Calculate time from now and next year December 10 at 12 PM


• it uses 'natural' elements to compute dates (by popular demand from the user of the old release)
• Add or subtract to dates, years, months, days in Calendar Date mode
• Add or subtract days, hours , minutes and seconds to guess future and past date-times in Time Precision mode
• No calculation buttons, adjusting date and time in two elements and instantly the result in the remaining third element is updated
• Result is also displayed in textual form on the bottom of the window.
• Result in the log (persistent over re-launch)
• Mac standard date-time controls you already know


• Results displayed and updated as you type
• Date format are expressed in accordance with your country settings
• Uses 'natural' elements to compute dates (years, months, days, hours, minutes, seconds)
• Uses 'natural' elements also to compute differences (years, months, days, hours, minutes, seconds)
• Result can be copied to the clipboard in textual format
• Date display using your current local settings and language
• 'Set date to now' button for fast calculation of backward and forward dates from the current date
• Calculates time difference, if requested, also using hours, minutes, seconds
• Calculates time interval, if requested, also using hours, minutes, seconds
• It can add or also subtract time
• Result summarized also in a plain text to avoid misinterpretation
• The result can be sent to the log, saved over re-launch
• Log can be reset at any time
• Bullet proof results using macOS Apple libraries to calculate and manipulate dates
• Fully compatible with Dark Mode Appearance
• PDF user guide embedded in the app and accessible via the Help menu

What’s New

Version 2.3.1

• Internal improvements
• Bug fix

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

jeffs23 ,

Programmers Point of View

Much as the other reviewer before me stated, I really like this app. I bought version 1 (also on store) and use it daily. The one complaint I had in version 1 - I found to have in Version 2. Did I pay more, yes - but when it fits a need, its worth it. I find myself having to calculate time differences very often and this app makes doing that simple for me. The log was a cool twist and something I can see myself using a lot.

All in all, this is very user friendly and I hope the developer(s) continue to enhance this more. While buying newer versions makes sense on big releases, I hope some of those modifications happen in this version and not force loyal customers to buying every new change. (Nickel and diming kills reputations). The changes between version 1 and 2 justify the added cost though so I cant complain. Thanks for a great app.


Awesome Date And Time Calculator!

This date and time calculator has a small footprint and works like it’s suppose to. I have tried many other similar apps that fell short of their basic functionality. Date And Time Calc 2 works like a charm. Thank you.

edm81363 ,

Does a great job

This program does a great job with not only date math, but also with time.


Roberto Panetta
2.1 MB

OS X 10.10 or later, 64-bit processor



Age Rating
Rated 4+
© 2011-2019 Ecleti - Roberto Panetta


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer