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Date Calculator

Date Calculator

Days Between Two Dates

Start Date

End Date

Holiday Setting

If not in the list, define the holidays below:

Holiday Name



Add to or Subtract from a Date

Start Date

Add / Sub:





Business Days Settings

If not in the list, define the holidays below:

Holiday Name



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An online day & date calculator is the tool that allows you to calculate date difference (number of days) or business days between two given dates. Simply, this date duration calculator works as a day counter and also helps you to:

  • Calculate plus or minus years, months, weeks, or days from a given date
  • Calculate number of days or business days added to or subtracted from a given date

So, before knowing about how this date & day calculator finds out number of days between two dates, you should beware of basic terms. This post helps you in better understanding to count days or even answer the question of how many days until today. Read on!

Evidence-Based Study About Date & Day:

Before the use of Gregorian calendar, an older concept of Julian calendar was used. It was excellently close to the precise length of the year. After so many years in the Middle Ages, the attempt to measure the time was first viewed as interfering into God’s affairs. In 1582, Caesar’s calendar finally reformed the Julian calendar to count days of the year. The “new” calendar, which is in the use today, was not adopted regularly across Europe until well into the 18th century. Now we can take its assistance to calculate days between two dates with accuracy.

About Date and Day:

The concept of the day of the week refers to a specific name such as Monday, Friday etc. Whereas in case of day of the month it refers to the number of day for example 2nd day of March. Calendar calculator is functioned to keep the record about how many days between dates. Moreover, it can also tell the duration between days to years. Record of months between dates can be monitored by it as well. likewise, you can also calculate days from specific dates.

On the other hand, date typically represents the month and the year alongside with the day. For example, the 21st March 2022. It will be fully defined always. While mentioning the date there is no need to mention the day as date itself is a complete entity. This date to date calculator is specialized to keep track of dates along with the calculation of the number of days.

Date Formats:

For United State (US) or Europe date formatting uses a: “forward-slash (/)”, “period (.), or “dash (-):

  • mm/dd/yyyy
  • mm.dd.yyyy
  • mm-dd-yyyy
  • dd/mm/yyyy
  • dd-mm-yyyy

For international date formatting according to ISO 8601 use only a dash separator (-):

  • yyyy-mm-dd

Remember that today’s date is based on GMT (Greenwich Mean Time) or UTC that is an acronym for Coordinated Universal Time.

What About Holidays?

The basic concept of holidays often instigated in association with religious observances in ancient times. the concept was different for different societies. People want to take days off to perform religious activates with full attention. Date differences were observed in different cultures. Days between holidays were considered as working days. some concept is applicable in this era as well. Year calculator is intended to calculate all the possible holidays of the year in one click. In this way it will be easy to keep the record of the holidays of whole year.

About Day & Date Calculator:

An online date and day calculator by calculator-online helps you to calculate the date difference or business days between any dates. Simply, determine the plus or minus days, weeks, months, years from a date with the assistance of this online calendar calculator. Also, this date & day counter calculate days or business days added to or subtracted from the given date.

Note: Our day & date calculator considers the workweek from “Monday” to “Friday” and Saturday & Sunday is assumes as a weekend in a 7 day of a week. Also, this date counter helps you to perform dates calculations if Saturday is your working day.

How to Calculate Days Between Two Dates & Add to or Subtract from a Date With This Day & Date Calculator:

The days calculator is 100% free and required only basic parameters to determine days and even count holidays, date, business days, calendar days, years, months, and weeks for your convenience. Let’s swipe down to know about the inputs that you have to enter and outputs that this calculator generates.

Calculate Days Between Two Dates:


  • First of all, you have to enter the start date that you want to compute (for e:g here we selected 01/01/2018)
  • Very next, you have to enter the end date (for e:g 02/02/2020)
  • Now, there’s a box, if you check the left side box, then the 1 day is added in the resultant days (for e:g we check this box)
  • Next, you can find the right box, if Saturday is working day, then check the box (for e:g we uncheck this box as Saturday is the weekend day)
  • Now, it comes to holiday setting, if you want to calculate only calendar days, then simply click on the first option of “Don’t Count Holidays”
  • And, if you want to calculate how many business day, holiday, and weekend between two dates, then define holidays (for example: we check on “Don’t Count Holidays”
  • Finally, hit the calculate button of this day & date calculator


The calculator will show:

  • From date & To date
  • Year between the two dates
  • Months between the two dates
  • Weeks between the two dates
  • Days between two dates
  • Hours between two dates
  • Minutes between two dates
  • Seconds between two dates
  • Business days between two dates
  • Weekend days between two dates

Add to or Subtract From a Date:


  • At first, you ought to enter the start date for which you want to perform calculations
  • Now, you have to select the operation that you want to perform on the selected date, the operation will be either (+) Add or (-) Subtract
  • Next, you just have to enter how many year, month, week, or day you want to add or subtract from the given date
  • Now, you can see the box, check this box if you want to add to or subtract the business day from a given date
  • There are two options in business days settings: “exclude weekend only” or “exclude weekend and holidays below
  • Once you entered the parameters according to your calculation requirements, simply hit the calculate button


  • The day calculator will shows you the final date corresponding to the given date

How Many Weeks Between Dates?

Between any two specific dates of future and past there are number of weeks. To keep the record and to count number of weeks between dates a calendar might be helpful. Or you can simply write the first date and second date and count the days between them. On the other hand, week Calculator is intended to calculate the weeks between dates. This week counter is an online and easily accessible tool to keep record of any two dates, past, current or future number of weeks.

How Many Days Since I Was Born?

To calculate the number of days since you came into this world till today, you can take help of this day to day calculator. today’s date from the date of your birth including days to month represents your chronological age. Therefore, to calculate number of days from birth you can use a simple rule below:

You have to subtract you date of birth from current date.

Take a look on the sample below:

Date of today 2014 03 (month) 01 (day)
Date of birth 1997 07 06
Age 16 7 25
  • in the above subtraction case you have minus years from years’, months from months and days from days.
  • you will borrow 30 days’ form months and add it into days so 01 + 30 = 31 and 31 – 06 = 25.
  • Now you have 2 months left so you will borrow one year from years to proceed the subtraction. Therefore, you will have 02 + 12 = 14 months and 14 – 7 = 7 months.
  • Now in the last step you will subtract year from year so 2013 – 1997 = 16.
  • So you have 16 years, 7 months and 25 days from the day you were born.

How Many Days Between Two Dates?

Simply, you can try an online day calculator to determine the number of days between two dates, but if you want to calculate it yourself, then swipe down!

Imagine that you have a difficult project due at your workplace and you are given specific days between 2 dates. You can use the days’ counter as a reminder as well as you can count between dates manually. Suppose you have the following two situations:

  • You need to calculate the date on which the progress check will take place and the due date is 27 December while initial date is 14 October?
  • You have to calculate the days you have before the progress check takes place?

To have the answer of the first situation, you need to deduct 14 days from the final date that is December 27. In this way, you will rapidly determine that the progress check will take place on 13th December.

Now we have the date on which the progress check will take place, we can easily determine the number of days between two dates. It is known as the difference between dates. You will simply count the days to date (27 December).

  • First of all, you have to minus the 14 days from the due date that is December 27 to have the progress check date i.e. 27 December – 14 December = 13 December.
  • Now apply a formula to calculate days between starting and ending date.
  • Number of days: 365 (year – 1) = (year – 1 / 4) -) – (year – 1 / 100) + (year – 1 / 400) + d + 367-362/ 12.
  • The result will be 61 days that you have left to complete your work.

Also, you can try an online calendar calculator to know the calendar days find the days between any two given dates.


How Many Holidays Between Two Dates?

You can, for sure, calculate the number of holidays between two dates manually. Every personis familiar with the fact that there are total 365 days in a normal year. Additional day will be added in circumstance of leap year. Therefore, calculating the number of holidays between two given dates isn’t the stress-free task. Off number of days between dates can be computed via use of calendar and marking them. You can mention the public holiday as well. On the other hand, you can use above mentioned formula to calculate the number of days between two dates.

How Many Months Between Two Dates?

The month is not very convinced unit of measurement. For example:

  • From 29th march to 1st April there are 0 months but 3 days.
  • From 29th December to 1st February there is one month and 3 days.

Such manual calculations with the assistance of regular or digital calendrers might get tricky to count and months. So, this dates calculator follows certain settlement, counts days from dates and full months between two dates.

Where You Need to Count The Days Between Dates (Common Applications):

The date calculator becomes very useful if you want to check out:

  • How many days since quarantine started
  • How many weeks between Halloween and Christmas
  • How many months between the new year
  • How long has it been since the Civil War ended
  • How many days are left until an official assignment
  • Event duration: for instance, how long the high school year is
  • How old you are in years, months, weeks, days, hours, minutes, or seconds
  • When you will be one billion seconds old
  • How many years left until the golden jubilee
  • How many days are left until a special day (wedding day, birthday, anniversary, etc)
  • How many days have passed since your friend wedding
  • The days between your due date or conception date
  • The start of your menstrual cycle or ovulate time
  • Simply add or subtract the number of years, months, weeks, days, hours, minutes, seconds: for instance, you stick to a 7-week training session and require to know which will be 7 weeks from the day you start
  • How many days (number of days) from today?


Why can I include the end date?

When you include end date in calculation, then it counts the final day in your result. If you want to count how many days something lasted, for instance, a training plan that lasted from 1st to and including the 4th day of the month, then you should checked it from our date calculator. If unchecked, the last day would not be counted (returning 3 days).

How do I calculate the number of days start a date in Excel?

In Excel, you can readily count number of days between two dates by using a simple formula i:e =End date –Start date, but this formula will exclude the start date. You can also use the calendar counter if you want to count days between two dates or calendar days.

How long is a month?

It’s approximately about 29.53 days!

A month is referred to as a unit of time that used with calendars; it is approximately as long as a natural period that is related to the motion of the Moon; month and Moon are said to be cognates. Remember that the traditional concept arose along with the cycle of Moon phases; such months (lunations) are synodic months and last approximately around 29.53 days.

How do I calculate years duration in Excel?

In a new cell, all you need to type in =DATEDIF(A1,B1,”Y”). The “Y” indicates that you had like the information, which reported in years. This will provides you with the number of years between the two dates. Want to determine the number of months or days between two dates, then simply type into a new cell: ==DATEDIF(A1,B1,”M”) for months or =DATEDIF(A1,B1,”D”) for days.

What day has the most birthdays?

The real birth data complied depict from 20 years of American births, mid-September is said to be as the most birthday-packed time of the years, 9th of September being the most popular day to be born in America (U.S), and followed closely by 19th of September.

What was the date six months ago today?

A date & day counter is an online tool that provides assistance whenever there is a need to calculate the date or time some months, days, or even years ago. While doing a hypothetical calculation you have to assume two dates. One represents the date that occurred 6 months ago and one date should represent the present date. A present date will represent the ending date and other one will be starting date. Now we will simply minus the ending date from the starting date. You must retain the following points while doing calculations:

  • Months will be minus from months
  • Days will be minus from days


From the source of day Wikipedia: Day (defined): Introduction form Apparent and mean solar day and more

From the source of pumas: How Many Days Are in a Year?

From the source of nationaltoday: National Day Calendar: what holiday is today or what holidays are coming up

From the source of english stackexchange: What’s the difference between day and date!

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