If on an Excel sheet you work not only with numbers, graphs, pictures, but also with dates, then you have probably encountered a situation where you needed to calculate the difference between them. For example, you need to determine the number of days or months for a certain period of time, or calculate the age of a person so that the result is in days, months and years, or maybe you need to calculate exactly working days.
There is already an article about calculating the difference in Excel on the site, and in it I touched on dates a little. But now let's look at this issue in more detail and figure out how to calculate the number of days between two dates in a simple way or using the RAZNDAT() function, and how to determine the number of working days.
Method 1: Subtraction
Let's start with the simplest thing - subtract the second from one date, and get the value we need. Before doing this, make sure that the format of the cells in which the numbers are written is “Date”.
If you haven’t filled them in yet, then select the range you want to work with and click on the small arrow next to the name of the “Number” group.
In the window that opens on the left, select the format that suits us, and then in the main area, decide on the type: 03/14/12, 14 Mar 12 or another. Click "OK".
In those cells for which you just changed the format, enter data. I filled out A1 and B1. Now you need to select any cell (D1) in which the general data format is set, otherwise the calculations will be incorrect. Put “=” in it and press first the late (B1) date, then the early (A1). To calculate the number of days between them, press “Enter”.
Method 2: Using a function
To do this, select the cell in which the result will be (B3), and make sure that the general format is selected for it.
To calculate days we will use the AZNDAT() function. It includes three arguments: start and end date, one. Unit is what we want to get the result in. Substituted here:
“d” – number of days;
“m” – number of full months;
“y” – number of full years;
“md” – will count days without taking into account months and years;
“yd” – counting days without taking into account only years;
“ym” – will count the months without taking into account the year.
We put an equal sign in B3, write RAZNDAT and open the bracket. Then select the early date (A1), then the latest date (B1), put a suitable unit in quotes and close the bracket. Place ";" between all arguments. . To calculate, press "Enter".
I came up with this formula:
RAZNDAT(A1;B1;"d")
Choosing “d” as the unit, I got the result - 111.
If you change this value, for example, to “md”, then the formula will calculate the difference between 5 and 24 without taking into account months and years.
By changing this argument in this way, it will be possible to derive the exact age of the person. In one cell there will be years “y”, the second month “ym”, the third day “md”
Method 3: counting working days
For example, let's take this sign. In column A we have the beginning of the month or the starting date of the countdown, in B we have the end of the month or countdown. This function counts working days without taking into account Saturday and Sunday, but there are also holidays in the months, so we will fill column C with the corresponding dates.
NETWORKDAYS(A5;B5;C5)
As arguments we indicate the start date (A5), then the end date (B5). The last argument is holidays (C5). We separate them with ";" .
By pressing “Enter” the result will appear, in the example cell D5 – 21 days.
Now consider if there are several holidays in a month. For example, in January there is New Year and Christmas. Select cell (D6) and put equal in it. Then click on the letter “f” in the formula bar. A window will open "Insert a function". In the Category field, select "Complete alphabetical list" and find the function you need in the list. Click "OK".
Next you need to select the function arguments. In “Start_date” we select the initial value (A6), in “End_date” we select the final value (B6). In the last field, enter the dates of holidays in parentheses () and quotation marks "". Then click "OK".
As a result, we will get the following function and the value will be calculated without taking into account weekends and specified holidays:
NETWORKDAYS(A6;B6;("01/01/17";"01/07/17"))
To avoid entering holidays manually, you can specify a specific range in the corresponding field. Mine is C6:C7.
The working days will be counted, and the function will look like:
NETWORKDAYS(A6;B6;C6:C7)
Now let's do the calculations for the last month. Enter the function and fill in its arguments:
NETWORKDAYS(A8;B8;C8)
In February there were 19 working days.
I wrote a separate article about other date and time functions in Excel, and you can read it by following the link.
Time calculations are constantly encountered in everyday life: from calculating days until a significant date to calculating the time of vacation or the period of payment on a bank loan. A collection of online calculators will help you easily operate such a complex parameter as time.
Time
Time management is not the name of a magic spell from a computer game, but a very real ability that has gained enormous popularity among businessmen and investors. Time management or is a technique for calculating time periods to effectively complete a certain amount of work. Thanks to competent and rest periods, people who use money management techniques manage to do much more than those who do not keep track of time and suffer from.
Naturally, time management is the science of more than just time distribution. The most important skills that allow you to competently organize work include:
- and manage resources;
- prioritize and;
- allocate time and analyze results.
Delegation is the transfer of work to subordinates or colleagues. Many ineffective managers believe that no one can do better than themselves. Naturally, overwhelmed with a bunch of unimportant work, they do not have time to complete priority tasks, as a result of which they become ineffective.
Finding priorities is an equally important thing. states that 80% of the result comes from 20% of the effort. In practice, this means that it is important to complete only those tasks on time on which 80% of success depends. As a rule, there are few such tasks, not strictly 20% as the Pareto principle promises, but usually in the range from 20 to 40%. It is the ability to separate the wheat from the chaff that creates productive leaders and businessmen.
The most famous, effective and at the same time simplest technique is considered to be “Pomodoro”. This is a time management technique, according to which work is performed at strictly designated intervals (usually 20 minutes), each of which is accompanied by a five-minute rest. The Pomodoro technique got its name because its creator measured periods of time using a kitchen timer in the shape of a tomato. Since then, modernized versions of time management have formed the basis for the success of prominent business representatives.
Timing
You can use the principles of money management not only when solving daily problems, but also when planning large projects that take weeks or months to complete. First of all, you should find out by what deadline the project must be completed or how much time is allocated for it. Let's take a closer look.
Number of days between two dates
This tool allows you to determine the number of days between two dates. For example, on October 20, 2017, you were assigned a project that must be completed by January 18, 2018. Going to the calendar and counting the time is not very convenient and it’s easier to use a calculator: just select the type of program and enter both dates. In the answer we see that you have 2 months and 29 days to complete the plan. Not very informative when planning. The program also expresses this time in days, weeks or months. Let's see. You have exactly 90 days or 12 working weeks. With this, you can already build an effective time management system and avoid deadlines.
What date will be in n days
Another convenient tool for efficient work. A large project at work may be assigned with the note “to be completed within 50 days after acceptance of the order.” This is a large amount of time, but again running to the calendar and calculating it is not very convenient. We use a calculator. Let's say the order was accepted for work on April 28, 2017. By what day does it need to be delivered to the customer? Let's change the calculator type and calculate the deadline date. It will be June 17, 2017, Saturday. Having the total number of days and the X date at hand, you can easily distribute efforts to complete the work on time.
What date was n days ago
This calculator will not be useful to you at work, but it will certainly come to the rescue in your personal life. Imagine that you received an SMS message in which your crush congratulates you on your 100th day of marriage. This is an important date that should not be forgotten, so it is better to use the program and find out about it. You received an SMS on July 4, 2017, now it’s easy to find out when you moved in with your crush. So, select the type of calculator, enter the date and the anniversary 100 days. Your memorable date is March 26, 2017, Sunday. It's worth circling this date on your calendar.
Temporary quantities
This calculator allows you to convert one time value into another. Using the program, you can express minutes into days, weeks into years, or centuries into millennia. In practice, this can be useful when calculating working hours for freelancers and freelance artists. For example, you have 28 working days to complete your next order. This is 672 hours. Let's take away the time for sleep 28 × 8 = 224, the time for breaks and rest 28 × 4 = 112 and we get that you have 336 hours for effective work. You can already work with this and use time management techniques for productive work.
Amount/time difference
This program gives you the ability to add hours or days and calculate the total time in months, weeks, days, minutes, seconds and even milliseconds. This is a fun calculator that can be used in practice to calculate the time required to complete several types of work or to calculate the free time remaining after completing a task.
| Beginning of the period (either through a slash or a dot) |
| End of period (either through a slash or dot) |
| Marked weekends in the week |
| P IN WITH H P WITH IN |
| Take into account the resolutions of the Government of the Russian Federation on the transfer of days |
| YES |
Calculation of working days and weekends
The calculator is quite simple, but nevertheless, in my opinion, very convenient for calculating the number of working days between arbitrary dates.
The calculator uses data on the transfer of working days and holidays, which are contained in the annual decrees of the Government of the Russian Federation.
Of course, there are many such calculators and we are not original in this, but there are several highlights that I think you will like and can be used to create other calculators.
First highlight: We may not take into account holiday dates contained in the decrees of the Government of the Russian Federation, but only take into account weekends (for Russia, Saturday and Sunday)
The second highlight: For those countries whose days off are other days of the week (for example, in Israel, the days off are Friday and Saturday), you can specify which days of the week will be days off. This is convenient not only for other countries, but also for local use, when it is known that we work in shifts every Thursday, Saturday and Tuesday.
Third highlight: We can use a completely arbitrary system of days off, specified in a certain form (this function is not displayed on the site, although the functionality is working) and for everyone, building a production calendar for Belarus, Kazakhstan or Serbia will not be difficult.
A pleasant side effect of this calculator is also the calculation of the number of days between two dates. Moreover, she calculates the difference in the same way as it is done in the accounting and personnel departments. That is, if a person works from July 1 to July 8, then it turns out to be 8 days. Since the last day is considered a working day.
Unlike mathematical and astronomical calculators, where with the same data it turns out to be 7 days. This error in one day appears due to the fact that in personnel decisions the last day is always a working day and must be taken into account, and in precise and abstract calculators it is believed that July 8 comes at midnight (0:0:0) and the difference between midnight on July 1 and midnight on July 8 (or 23 hours 59 minutes 59 seconds 999 milliseconds, 999999 microseconds, etc. on July 7) will be exactly 7 days.
The main principle that the bot adheres to is the frequency of days off during the week. If this is observed, the calculator will give the result you expected.
It is a pity that the resolutions of the Government of the Russian Federation still do not implement a QR code, where all holidays for the current code would be indicated for machine processing. This would simplify the work of a certain circle of people.
Holidays and transfers on the territory of the Russian Federation are taken into account from 2010 to 2019 inclusive.
For users who need to calculate the first working date after a vacation or business trip or other period of time, pay attention to this calculator. Date of return to work from vacation, maternity leave online
Syntax
For Jabber clients
rab_d date.start; end date;week
a week - provides complete information on how to calculate working days and hours. A week consists of seven symbols 0 or 1, where each symbol has its own role. 0 - person is working, 1 - person is not working (day off). If the week is empty, then the code 0000011 is used - that is, Saturday and Sunday are closed.
I would like to note that this is a calendar week and this indicator shows how you rest during the week. Our week numbering starts from zero and this day is Monday, then Tuesday -1, Wednesday -2, etc.
start date - date in the form DD/MM/YYYY - indicates the beginning of the range for which the number of working days is calculated
end date - date in the form DD/MM/YYYY - indicates the end of the range for which the number of working days is calculated
ATTENTION! The date can be entered using a period or a slash. It is more convenient to enter through a dot on cell phones and tablets, and through a slash it is more convenient to enter on a computer on the keyboard on the right (digital panel)
Examples of using
rab_d 1/1/2014;31/12/2014
in response we will receive
Number of days between two specified dates 365
Number of working days 247
Number of weekends and holidays 118
rab_d 2/7/2010;25/10/2013
In response we will receive
Number of days between two specified dates 1212
Number of working days 827
Number of weekends and holidays 385
rab_d 20/1/2010;10/2/2014;0101001
In response we get
Number of days between two specified dates 1483
Number of working days 797
Number of weekends and holidays 686
The previous example, but does not take into account public holidays. As an option for use, shift duty, security, etc.
| Beginning of the period (either through a slash or a dot) |
| End of period (either through a slash or dot) |
| Marked weekends in the week |
| P IN WITH H P WITH IN |
| Take into account the resolutions of the Government of the Russian Federation on the transfer of days |
| YES |
Calculation of working days and weekends
The calculator is quite simple, but nevertheless, in my opinion, very convenient for calculating the number of working days between arbitrary dates.
The calculator uses data on the transfer of working days and holidays, which are contained in the annual decrees of the Government of the Russian Federation.
Of course, there are many such calculators and we are not original in this, but there are several highlights that I think you will like and can be used to create other calculators.
First highlight: We may not take into account holiday dates contained in the decrees of the Government of the Russian Federation, but only take into account weekends (for Russia, Saturday and Sunday)
The second highlight: For those countries whose days off are other days of the week (for example, in Israel, the days off are Friday and Saturday), you can specify which days of the week will be days off. This is convenient not only for other countries, but also for local use, when it is known that we work in shifts every Thursday, Saturday and Tuesday.
Third highlight: We can use a completely arbitrary system of days off, specified in a certain form (this function is not displayed on the site, although the functionality is working) and for everyone, building a production calendar for Belarus, Kazakhstan or Serbia will not be difficult.
A pleasant side effect of this calculator is also the calculation of the number of days between two dates. Moreover, she calculates the difference in the same way as it is done in the accounting and personnel departments. That is, if a person works from July 1 to July 8, then it turns out to be 8 days. Since the last day is considered a working day.
Unlike mathematical and astronomical calculators, where with the same data it turns out to be 7 days. This error in one day appears due to the fact that in personnel decisions the last day is always a working day and must be taken into account, and in precise and abstract calculators it is believed that July 8 comes at midnight (0:0:0) and the difference between midnight on July 1 and midnight on July 8 (or 23 hours 59 minutes 59 seconds 999 milliseconds, 999999 microseconds, etc. on July 7) will be exactly 7 days.
The main principle that the bot adheres to is the frequency of days off during the week. If this is observed, the calculator will give the result you expected.
It is a pity that the resolutions of the Government of the Russian Federation still do not implement a QR code, where all holidays for the current code would be indicated for machine processing. This would simplify the work of a certain circle of people.
Holidays and transfers on the territory of the Russian Federation are taken into account from 2010 to 2019 inclusive.
For users who need to calculate the first working date after a vacation or business trip or other period of time, pay attention to this calculator. Date of return to work from vacation, maternity leave online
Syntax
For Jabber clients
rab_d date.start; end date;week
a week - provides complete information on how to calculate working days and hours. A week consists of seven symbols 0 or 1, where each symbol has its own role. 0 - person is working, 1 - person is not working (day off). If the week is empty, then the code 0000011 is used - that is, Saturday and Sunday are closed.
I would like to note that this is a calendar week and this indicator shows how you rest during the week. Our week numbering starts from zero and this day is Monday, then Tuesday -1, Wednesday -2, etc.
start date - date in the form DD/MM/YYYY - indicates the beginning of the range for which the number of working days is calculated
end date - date in the form DD/MM/YYYY - indicates the end of the range for which the number of working days is calculated
ATTENTION! The date can be entered using a period or a slash. It is more convenient to enter through a dot on cell phones and tablets, and through a slash it is more convenient to enter on a computer on the keyboard on the right (digital panel)
Examples of using
rab_d 1/1/2014;31/12/2014
in response we will receive
Number of days between two specified dates 365
Number of working days 247
Number of weekends and holidays 118
rab_d 2/7/2010;25/10/2013
In response we will receive
Number of days between two specified dates 1212
Number of working days 827
Number of weekends and holidays 385
rab_d 20/1/2010;10/2/2014;0101001
In response we get
Number of days between two specified dates 1483
Number of working days 797
Number of weekends and holidays 686
The previous example, but does not take into account public holidays. As an option for use, shift duty, security, etc.
A calendar is a way of counting and displaying large periods of time.
All our calculations are carried out within the framework of the Gregorian calendar, which is now generally accepted throughout the world (the average length of the year is 365.2425 days). When making historical calculations, please check the dating. The difference between the readings of the Gregorian and Julian calendars is now 13 days, but in the early centuries the number of days between equal dates was smaller, the smaller the closer to the beginning of our era ().
Date 1
Sun 22 . 06 . 1941 04 : 00
original date
21
Interval
1417
days between dates
0
centuries between dates
Date 2
Tue 09 . 05 . 1945 01 : 43
final date
21
1012
working days between dates *
3
years between dates
46
months between dates
34009
hours between dates
2040583
minutes between dates
122434980
seconds between dates
3
10
17
1
43
years months days hours minutes
between two dates
The number of minutes and seconds in a date cannot exceed 60, you entered... other date parameters will also be changed
The number of hours in the date cannot exceed 23, you entered: ... - other date parameters will also be changed
Attention!
Russian holidays are taken into account in full only if both dates belong to 2018
The number of days in a month\ncannot be more than 31
Ooh!
The number you entered refers to times that are difficult to imagine...
Sorry!
Here is a simple online calculator, aware of its, alas, modest capabilities, and not an astronomical program!
Please enter a different number.
Based on this small scoreboard, it was created.
Now the calculation table is configured to count the days until the start of summer.
To calculate how many days have passed or will pass between the dates you are interested in, simply enter them in the appropriate fields of the table. The time interval can be changed in the same way as dates, in this case the countdown will be from “Date 1”, and “Date 2” will change.
The calculation results also display unchangeable information values and indicators - these are the days of the week (dark gray - weekdays, orange-red - weekends) and, as a final summary, the interval between dates, expressed in years, months, days, hours and minutes .
If on the scoreboard you see the most fateful period in history for our country - the days between the dates of the Great Patriotic War, then it means that Jawa Script is disabled in your browser and you need to enable it to carry out calculations.
* Within 2019 of the year calculation of working days is underway taking into account Russian holidays and the scheme for transferring weekends approved by the government of the Russian Federation. For long periods of time between dates, calculations of the number of working days are carried out on the assumption of a five-day working week, Holidays are not taken into account.
Sergey Ov(Seosnews9)
Reference: It is reliably known that at the end of the first millennium in Ancient Rus', the counting of time was carried out according to the Julian calendar, although the new year was celebrated on March 1, the counting of time according to such a calendar is called the March style. The difference between the equal dates of the modern and ancient calendars on March 1, 1000 was 59+6=65 days (6 days difference between the Julian and Gregorian calendars; dates with equal numbers and equal month numbers from the beginning of the year are considered equal dates).
In 1492, by resolution of the Moscow Council of the Russian Orthodox Church, a calendar was adopted, according to which the new year (New Year) began on September 1 ( September style
), the difference with the modern calendar was 9-122=-113 days.
Two centuries later, on the eve of the round calendar date, Peter the Great introduces a calendar that calculates from the Nativity of Christ. The New Year in Russia has been celebrated on January 1 since 1700 (however, in fact, according to the modern calendar, this new year came on January 11, 1700). The country went from 7208 to 1700! So, in the then new 18th century, which began in 1701, Russia entered almost in step with Europe. Almost in step, because chronology, as before, was carried out according to the Julian calendar (only the dating has changed, now it is called old style)
, while Europe has already partially switched to the Gregorian calendar.
The modern Gregorian calendar in Russia was adopted only in the 21st century. January 26, 1918: Vladimir Ilyich Lenin signed a decree of the Council of People's Commissars on the transition to a new calculation of time, while the dating shifted by 13 days. The last state document dated according to the old style was published on January 31, 1918 - the next day was February 14!
So the question is: "How many days are there between two dates?" in a historical sense always requires clarification...