Advanced Date Time Calculator is a full-featured date time calculator that contains 6 main functions:
  • Calculates the result date time by adding/subtracting some years, months, weeks, days, hours, minutes and/or seconds to/from a base time, for instance: get the result time by adding 3.29 years, 1.8 weeks and 982 seconds to current time.
  • Calculates the differences (years, months, weeks, days, hours, minutes, seconds and integrated difference) between two times, it is usually used to get the years/months/weeks/days/hours/minutes counts for the past/future events based on current date time, such as birth, marriage and anniversary. So, it has initialized the start and end date time as current date time for you, just change one date time to count the number of years/months/weeks/days/hours/minutes/seconds of your past/future events based on current time, for instance: you can quickly get "How many seconds/days you live".
  • Counts the days of week, weekdays, weekends between two dates, e.g. easily get the days of week between Jan 29, 1819 and Oct 14, 1981.
  • Gets the conversion between various date time elements (days, years, months, weeks, minutes, seconds, hours), with this tool, you can easily and quickly know about the answers of some time conversion questions, such as "how many seconds in a year".
  • Compares the specified time between local time zone and two other special time zones, and lists the times of all time zones in the world for the specified local time.
  • Calculate the exact date that indicated by a large days/seconds number that passed from UNIX base date (Jan 01, 1970), or get the corresponding UNIX/Linux days/seconds number by specifying a general date, e.g. 15,551 days indicates Jul 30, 2012.
All above results are instantly shown after changed any conditions (base time, algorithm (+/-), values of date time elements, begin/end date time, UNIX days/seconds number), do not need to click any button such as <Calculate>, <Count>.

Also, it supports thousands separator and decimal in all numeric fields (years, months, weeks, days, hours, minutes, seconds, days of week, weekdays and weekends).
Download Download v6.0 for Windows®, 638 KB, Updated at Oct 12, 2016

Descriptions in Other Languages


Advanced Date Time Calculator 是一个功能全面的日期时间计算器,包含六大功能:
  • 从一个基准时间加上或减去指定数量的年、月、周、天、时、分及/或秒数来算出目标日期时间,例如:取得将当前时间加上 3.29 年、1.8 周及 982 秒的结果。
  • 计算两个时间之间的差异(年、月、周、天、时、分、秒及整合差异),通常用来取得过去/将来事件距当前日期时间的年/月/周/天/时/分数,例如出生、结婚及周年纪念。举例:您可以快速知道“您活了多少秒/天?”。
  • 统计两日期之间的天数(周几、工作日、周末),如:轻松取得 1819/01/29 到 1981/10/14 之间的天数(周几)。
  • 在各种日期时间元素(天、年、月、周、分、秒、时)间转换,通过这个工具,您可以轻易并快速地知道一些时间转换问题的答案,如“一年有多少秒?”。
  • 比较本地时区及其他两个选定时区的指定时间,并列出指定本地时间在世上所有时区为何时。
  • 通过起始于 UNIX 基准日期(1970/01/01)的数值很大的天/秒数来计算普通日期,或反之。如:15,551 天表示 2012/7/30。

Download Download v6.0 for Windows®, 638 KB, Updated at Oct 12, 2016


Advanced Date Time Calculator 是一個功能全面的日期時間計算器,包含六大功能:
  • 從一個基準時間加上或減去指定數量的年、月、週、天、時、分及/或秒數來算出目標日期時間,例如:取得將當前時間加上 3.29 年、1.8 週及 982 秒的結果。
  • 計算兩個時間之間的差異(年、月、週、天、時、分、秒及整合差異),通常用來取得過去/將來事件距當前日期時間的年/月/週/天/時/分數,例如出生、結婚及週年紀念。舉例:您可以快速知道“您活了多少秒/天?”。
  • 統計兩日期之間的天數(週幾、工作日、週末),如:輕鬆取得 1819/01/29 到 1981/10/14 之間的天數(週幾)。
  • 在各種日期時間元素(天、年、月、週、分、秒、時)間轉換,通過這個工具,您可以輕易並快速地知道一些時間轉換問題的答案,如“一年有多少秒?”。
  • 比較本地時區及其他兩個選定時區的指定時間,並列出指定本地時間在世上所有時區為何時。
  • 經由起始於 UNIX 基準日期(1970/01/01)的數值很大的天/秒數來計算普通日期,或反之。如:15,551 天表示 2012/7/30。

Download Download v6.0 for Windows®, 638 KB, Updated at Oct 12, 2016
BitsDuJour's Review

QuoteInstant Calculation of Date and Time Differences

Sure, your handy desk or online calendar does a pretty good job of letting you know what date occurs ten days from now, but that's not heavy lifting. What do you do when you need to figure out a certain date that's way off into the future, or back in the past? If it's critically important to be correct, you can't leave that up to the figuring in your head! That's why you need to get a copy of today's discount software promotion, Advanced Date Time Calculator!

Advanced Date Time Calculator is a powerful time date calculator that can calculate result dates, differences in dates, days of the week, and more (also can be considered as an "elapsed time calculator", "time duration calculator" or "date duration calculator"). With Advanced Date Time Calculator, you'll have control over the most finely detailed date and time calculations, down to the very second. What's more, if you ever need to convert units of time, like when you need to know how many seconds are in three months, Advanced Date Time Calculator will handle these types of tasks without nary a hiccup. You can even calculate how much time has elapsed since a specific UNIX base date, which is useful for many programming functions.

Precision is the name of the game when you use Advanced Date Time Calculator. With support for decimals and a thousands separator for numeric fields, you will never need another temporal calculator other than Advanced Date Time Calculator!

Download Download v6.0 for Windows®, 638 KB, Updated at Oct 12, 2016's Review

Quote Advanced Date Time Calculator - a great tool for calculating the exact difference between two moments in time!

Knowing the exact time between two events may be useful in a number of situations. For instance, wouldn't it be nice to know how many days have passed since your birth? Or how many weeks you'll have to wait (and study through) before you graduate? Or, turning to a more practical side of things, how many days your deposit will be generating revenue for you until you withdraw it on your 33rd birthday? How many seconds will your program work until 3:45:33 PM tomorrow? Advanced Date Time Calculator answers all of these questions in style and gives you nearly unlimited power for calculating the time difference between two events.

Advanced Date Time Calculator is a handy and easy to use tool that enables you to determine the day and time after/before the current day and time by adding/subtracting any number of years, months, weeks, days, hours and seconds; determine the length of the period in any unites of time between two events; calculate the number of weeks, weekends and weekdays between any two dates; and works as a universal time converter. Although most users will be happy with up-to-hour or -minute accuracy, those looking for true precision will appreciate the ability of the program to instantly calculate the time difference down to the second. The program features a simple tabbed interface for ease of access to the key features.

If you've been on the look for a compact, affordable and easy to use application for calculating the length of periods between any two events, you will hardly find a better candidate for the job than Advanced Date Time Calculator!
Download Download v6.0 for Windows®, 638 KB, Updated at Oct 12, 2016

Softpedia's Review

QuoteA date and time calculator that can also display the difference between two values or convert years, months, weeks and day in to other parameters

When you want to calculate how much time has passed between two specific dates (includes "calculate days between two dates") it is best to use dedicated utilities, no matter if they are online or on your PC.

Advanced Date Time Calculator falls into the latter category, and it can provide you with several additional functions that can come in handy.

Intuitive time and date calculator

The application features a user-friendly GUI (graphic user interface) and, even if you are a beginner, you can access whichever tab you prefer.

If you go for the first one, you can calculate what date it will be if you add several years, months, weeks or day to a specified date. Similarly, you can subtract years, months or days from a certain date.

Moreover, you can also add or subtract hours, minutes or seconds if you are looking to obtain a very exact time and date.

Calculate time between two dates

Due to this application, you can also calculate how much time has passed between two certain dates (can be used as "time elapsed calculator" also). You first need to enter the day, month and year either manually, or using the integrated calendar.

As soon as the two fields have been filled in, the utility automatically starts the calculation and displays the difference (such as "how many days between dates", "weeks between dates", etc.). You can copy the result to the clipboard, but only if you are interested in its generic form. In other words, you cannot copy the output expressed in elements, i.e. solely in years, months, weeks and so on.

Count weekends and weekdays between two dates

Another useful function of Advanced Date Time Calculator is that it can count how many weekdays and weekends have passed between two specified dates. It also shows how many Sundays, Mondays, Tuesdays, etc. have passed.

All in all, this application can help you save time when planning events or simply converting time units from one value to another.
Update History

Release/Update Date
Features / Improvements Bug Fixes
Oct 12, 2016
  • Important: can compares the time between different time zones.
  • Important: can display the time of all time zones in the world for a specified time.
  • Important: supports to reset all date/time values to current time.
  • Aligns the drop-down calendars to right (near the clicked arrow), friendlier and easier to use.
  • Optimized the size and location for all UI elements.
  • Optimized the definition of the logo on the About interface.
  • Optimized the color of the license related texts.
  • Changed the trial limitation from "16 days trial" to "timed locking".
  • Changed the format of all screenshots on the website from GIF to PNG, in order to let you see the original and most clear appearance of the product.
  • The text of <Language> button is not aligned with other buttons.
Sep 04, 2016
  • Important: allows you to run multiple instances, because it is a calculator!
  • Important: supports multi-language.
  • Important: fully supports native 简体中文 & 繁體中文.
  • Important: now the installer supports multi-language also, and let you choose when install. Even, it can directly use the language that selected during installing.
  • Open translation interface for multi-language version.
  • Optimized, beautified and standardized all interfaces (size, location, spacing, margins and alignment).
  • Optimized software texts.
  • No longer uses the bold texts on all interfaces, replaced them with colorful texts, more readable and beautiful.
  • Changed the splitter color from black to gray for all related interfaces to make them friendlier.
  • Optimized the color scheme of all interfaces.
Oct 21, 2015
  • Important: perfected UI effect for any system DPI setting, in any supported Operating Systems (system DPI setting: in Windows 7, it can be changed at "Control Panel -> Appearance and Personalization -> Display -> Make text and other items larger or smaller").
  • Important: supports Windows 10.
  • Important: uses Golden Ratio for the start position of the main interface.
  • Moved all actions which need to run the default email client to the online webpages, in order to avoid the confusion if who has not a default email client.
  • Optimized internal efficiency.
  • Optimized the location of the drop-down menus on the main interface.
  • Optimized software texts.
  • Optimized website texts.
  • Optimized the definition of some icons.
  • Optimized Help menu.
  • Beautified software interfaces.
  • Redesigned the licenses.
  • The verified license key may be covered if you input a wrong key after registered.
  • A little text error in license agreement of the installer.
Sep 07, 2012
  • Supports thousands separator and decimal in all numeric fields (years, months, weeks, days, hours, minutes, seconds, days of week, weekdays and weekends).
  • It may be out of range when add/subtract a large number of minutes or seconds in "Date & Time" module.
May 29, 2011
  • Supports integrated differences in "Differences" module.
Oct 11, 2009
  • In "Date & Time" module, supports adding/subtracting some date time elements (weeks, hours and others) to/from a base time simultaneously, the older versions can only specify an element number per time.
Sep 26, 2008
  • New module: "UNIX Date" - used to calculate UNIX/Linux date based on a large days/seconds number.
Nov 15, 2007
  • New module: "Converter" - used to get the conversion between various date time elements (days, minutes and others).
Oct 23, 2006
  • New module: "Days of Weeks" - used to count days of weeks, weekdays, weekends between two dates.
Aug 27, 2005
  • New module: "Date & Time" - used to get the result time by adding some days, seconds or others to a base time.
Sep 18, 2004
  • New release.
Download Download v6.0 for Windows®, 638 KB, Updated at Oct 12, 2016


Download Download v6.0 for Windows®, 638 KB, Updated at Oct 12, 2016

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Subject: Recommend software - Advanced Date Time Calculator: A full-featured date time calculator/counter (from 'your name here')


I'm using Advanced Date Time Calculator, it is a full-featured date time calculator that used to get the result date time, calculate the differences and count the days of week, weekdays, weekends between two dates/times, get the conversion between various date time elements, calculate UNIX date.

You should have a test!

Official page:
Direct download:
Download Download v6.0 for Windows®, 638 KB, Updated at Oct 12, 2016