cancel
Showing results for 
Search instead for 
Did you mean: 
Reply

Calculate months between two dates!!!

Hi,

I have a use case where I need to calculate number of months and days between two dates in a SharePoint list.

The result should be ex. 5,30 --- where first digit is months and the second is days

 

Below is the formula I found, but for some reason it's not accepted by SP.

=DATEDIF([StartDate]],[EndDate],"MD")

 

Does anyone have a suggestion how to do this?

 

BR /ZorroZZ

1 ACCEPTED SOLUTION

Accepted Solutions
Expiscornovus
Most Valuable Professional
Most Valuable Professional

Hi @Zoran,

 

For the calculation of the number of days you could use some sub the number of ticks of the start date from the end date. After that you can div it by to get the number of days.

 

Below is an example expression:

div(sub(ticks(variables('EndDate')), ticks(variables('StartDate'))),864000000000)

 

The months is a bit harder, since it hasn't got the same amount of days each month. A calendar month may contain 28 to 31 calendar days.

 

If you don't mind it is less accurate you can probably just divide the outcome of the first expression by the average, which I believe is 30.437 (including leap years etc.)



Happy to help out! 🙂

Interested in more #PowerAutomate #SharePointOnline or #MicrosoftCopilotStudio content?
Visit my blog, Subscribe to my YouTube channel or Follow me on Twitter


View solution in original post

8 REPLIES 8
Expiscornovus
Most Valuable Professional
Most Valuable Professional

Hi @Zoran,

 

For the calculation of the number of days you could use some sub the number of ticks of the start date from the end date. After that you can div it by to get the number of days.

 

Below is an example expression:

div(sub(ticks(variables('EndDate')), ticks(variables('StartDate'))),864000000000)

 

The months is a bit harder, since it hasn't got the same amount of days each month. A calendar month may contain 28 to 31 calendar days.

 

If you don't mind it is less accurate you can probably just divide the outcome of the first expression by the average, which I believe is 30.437 (including leap years etc.)



Happy to help out! 🙂

Interested in more #PowerAutomate #SharePointOnline or #MicrosoftCopilotStudio content?
Visit my blog, Subscribe to my YouTube channel or Follow me on Twitter


msonmez
Frequent Visitor

Hello,

 

Instead of calculating days with ticks and converting them to months, I have used following approach: 

 

DATE 1: 31.12.2019

DATE 2: 16.11.2021

Expected difference result = 1 Years, 10 Months, 16 days = 22 Months (+16 days, which will be ignored)

 

  1. I have started substracting years without thinking about the day and month. Year difference is 2021-2019 = 2 Years 
  2. With the same thought, month difference is 11-12 = -1 Months 
  3. And for the days, days difference = 16-31= -15 Days. It is only important, if the difference is less then 0 -> in this case 15-31 < 0.

My formula is =  (Month Difference) + (If Days Difference < 0 then -1 else 0) + 12*(Year Difference)

 

With my example, it will be (-1) + (-1) + 12*2 = 22 Months

 

You can implement this with multiple was in Power Automate, I have decided to use couple of Compose actions : 

 

msonmez_0-1660059267211.png

Document Date Difference Days :
sub(int(formatDateTime(DATE2, 'dd')),int(formatDateTime(DATE1, 'dd')))
Document Date Difference Month
sub(sub(int(formatDateTime(DATE2, 'MM')),int(formatDateTime(DATE1, 'MM'))),if(lessOrEquals(int(outputs('Document_Date_Difference_Days')),0),1,0))
Document Date Difference Years
mul(sub(int(formatDateTime(DATE2, 'yyyy')),int(formatDateTime(DATE1, 'yyyy'))),12)
Date Difference Total Months

add(outputs('Document_Date_Difference_Years'),outputs('Document_Date_Difference_Month'))

 

 

This formulas are cool BUT, when I put data with 1yr difference, for example 01.03.2022 and 01.03.2023

 

Document Date Difference Month
sub(sub(int(formatDateTime(DATE2, 'MM')),int(formatDateTime(DATE1, 'MM'))),if(lessOrEquals(int(outputs('Document_Date_Difference_Days')),0),1,0))
It  return result -1, when it might return 0 (when it might be 12)
 
or if I put 01.03.2022 and 01.02.2023
It returns -2 value (when it might be 11)

Hi msonmez,

 

That will be help full if i get to know what if i want the days also , as in your example it was ignored?

Hi,

 

I had similar challenge. I reviewed it and that really there are 3 possible scenarios to calculate:

  1. You have two dates in the same year - then you need to subtract earlier month from later month
  2. You have two dates year after year - then you need to calculate number of months in first year and in a second year
  3. You have two dates and different in years is bigger then 1 - then you need to do the same like in point 2, plus number of months in each other year

I calculated it in a Compose step as if statement:

 

Checking difference in years:

sub(
    int(formatDateTime(triggerOutputs()?['body/c9_enddate'], 'yyyy')),
    int(formatDateTime(triggerOutputs()?['body/c9_startdate'], 'yyyy'))
)

if 0 then subtract months:

sub(
    int(formatDateTime(triggerOutputs()?['body/c9_enddate'], 'MM')),
    int(formatDateTime(triggerOutputs()?['body/c9_startdate'], 'MM'))
)

if 1 then calculate months in each year and add them together:

add(
  sub(
    12,
    int(formatDateTime(triggerOutputs()?['body/c9_startdate'], 'MM'))
  ),
  int(formatDateTime(triggerOutputs()?['body/c9_enddate'], 'MM'))
)

if more then 1 calculate months in first and last year, plus 12 month in each year in between:

add(
  add(
    sub(
      12,
      int(formatDateTime(triggerOutputs()?['body/c9_startdate'], 'MM'))
    ),
    int(formatDateTime(triggerOutputs()?['body/c9_enddate'], 'MM'))
  ),
  mul(
    12,
    sub(
      sub(
        int(formatDateTime(triggerOutputs()?['body/c9_enddate'], 'yyyy')),
        int(formatDateTime(triggerOutputs()?['body/c9_startdate'], 'yyyy'))
      ),
      1
    )
  )
)

Full expression:

if(
  equals(
    sub(
      int(formatDateTime(triggerOutputs()?['body/c9_enddate'], 'yyyy')),
      int(formatDateTime(triggerOutputs()?['body/c9_startdate'], 'yyyy'))
    ), 
    0
  ),
  sub(
    int(formatDateTime(triggerOutputs()?['body/c9_enddate'], 'MM')),
    int(formatDateTime(triggerOutputs()?['body/c9_startdate'], 'MM'))
  ),
  if(
    equals(
      sub(
        int(formatDateTime(triggerOutputs()?['body/c9_enddate'], 'yyyy')),
        int(formatDateTime(triggerOutputs()?['body/c9_startdate'], 'yyyy'))
      ), 
      1
    ),
    add(
      sub(
        12,
        int(formatDateTime(triggerOutputs()?['body/c9_startdate'], 'MM'))
      ),
      int(formatDateTime(triggerOutputs()?['body/c9_enddate'], 'MM'))
    ),
    add(
      add(
        sub(
          12,
          int(formatDateTime(triggerOutputs()?['body/c9_startdate'], 'MM'))
        ),
        int(formatDateTime(triggerOutputs()?['body/c9_enddate'], 'MM'))
      ),
      mul(
        12,
        sub(
          sub(
            int(formatDateTime(triggerOutputs()?['body/c9_enddate'], 'yyyy')),
            int(formatDateTime(triggerOutputs()?['body/c9_startdate'], 'yyyy'))
          ),
          1
        )
      )
    )
  )
)

 

Best Regards

@MNowicki , thanks so much for this solution. This covered different date scenarios that span across years. Thanks again for this optimal solution

Gracias! 

Gracias!!

Helpful resources

Announcements

Community will be READ ONLY July 16th, 5p PDT -July 22nd

Dear Community Members,   We'd like to let you know of an upcoming change to the community platform: starting July 16th, the platform will transition to a READ ONLY mode until July 22nd.   During this period, members will not be able to Kudo, Comment, or Reply to any posts.   On July 22nd, please be on the lookout for a message sent to the email address registered on your community profile. This email is crucial as it will contain your unique code and link to register for the new platform encompassing all of the communities.   What to Expect in the New Community: A more unified experience where all products, including Power Apps, Power Automate, Copilot Studio, and Power Pages, will be accessible from one community.Community Blogs that you can syndicate and link to for automatic updates. We appreciate your understanding and cooperation during this transition. Stay tuned for the exciting new features and a seamless community experience ahead!

Summer of Solutions | Week 4 Results | Winners will be posted on July 24th

We are excited to announce the Summer of Solutions Challenge!    This challenge is kicking off on Monday, June 17th and will run for (4) weeks.  The challenge is open to all Power Platform (Power Apps, Power Automate, Copilot Studio & Power Pages) community members. We invite you to participate in a quest to provide solutions to as many questions as you can. Answers can be provided in all the communities.    Entry Period: This Challenge will consist of four weekly Entry Periods as follows (each an “Entry Period”)   - 12:00 a.m. PT on June 17, 2024 – 11:59 p.m. PT on June 23, 2024 - 12:00 a.m. PT on June 24, 2024 – 11:59 p.m. PT on June 30, 2024 - 12:00 a.m. PT on July 1, 2024 – 11:59 p.m. PT on July 7, 2024 - 12:00 a.m. PT on July 8, 2024 – 11:59 p.m. PT on July 14, 2024   Entries will be eligible for the Entry Period in which they are received and will not carryover to subsequent weekly entry periods.  You must enter into each weekly Entry Period separately.   How to Enter: We invite you to participate in a quest to provide "Accepted Solutions" to as many questions as you can. Answers can be provided in all the communities. Users must provide a solution which can be an “Accepted Solution” in the Forums in all of the communities and there are no limits to the number of “Accepted Solutions” that a member can provide for entries in this challenge, but each entry must be substantially unique and different.    Winner Selection and Prizes: At the end of each week, we will list the top ten (10) Community users which will consist of: 5 Community Members & 5 Super Users and they will advance to the final drawing. We will post each week in the News & Announcements the top 10 Solution providers.  At the end of the challenge, we will add all of the top 10 weekly names and enter them into a random drawing.  Then we will randomly select ten (10) winners (5 Community Members & 5 Super Users) from among all eligible entrants received across all weekly Entry Periods to receive the prize listed below. If a winner declines, we will draw again at random for the next winner.  A user will only be able to win once overall. If they are drawn multiple times, another user will be drawn at random.  Individuals will be contacted before the announcement with the opportunity to claim or deny the prize.  Once all of the winners have been notified, we will post in the News & Announcements of each community with the list of winners.   Each winner will receive one (1) Pass to the Power Platform Conference in Las Vegas, Sep. 18-20, 2024 ($1800 value). NOTE: Prize is for conference attendance only and any other costs such as airfare, lodging, transportation, and food are the sole responsibility of the winner. Tickets are not transferable to any other party or to next year’s event.   ** PLEASE SEE THE ATTACHED RULES for this CHALLENGE**   Week 1 Results: Congratulations to the Week 1 qualifiers, you are being entered in the random drawing that will take place at the end of the challenge.   Community MembersNumber SolutionsSuper UsersNumber Solutions Deenuji 9 @NathanAlvares24  17 @Anil_g  7 @ManishSolanki  13 @eetuRobo  5 @David_MA  10 @VishnuReddy1997  5 @SpongYe  9JhonatanOB19932 (tie) @Nived_Nambiar  8 @maltie  2 (tie)   @PA-Noob  2 (tie)   @LukeMcG  2 (tie)   @tgut03  2 (tie)       Week 2 Results: Congratulations to the Week 2 qualifiers, you are being entered in the random drawing that will take place at the end of the challenge. Week 2: Community MembersSolutionsSuper UsersSolutionsPower Automate  @Deenuji  12@ManishSolanki 19 @Anil_g  10 @NathanAlvares24  17 @VishnuReddy1997  6 @Expiscornovus  10 @Tjan  5 @Nived_Nambiar  10 @eetuRobo  3 @SudeepGhatakNZ 8     Week 3 Results: Congratulations to the Week 3 qualifiers, you are being entered in the random drawing that will take place at the end of the challenge. Week 3:Community MembersSolutionsSuper UsersSolutionsPower Automate Deenuji32ManishSolanki55VishnuReddy199724NathanAlvares2444Anil_g22SudeepGhatakNZ40eetuRobo18Nived_Nambiar28Tjan8David_MA22   Week 4 Results: Congratulations to the Week 4 qualifiers, you are being entered in the random drawing that will take place at the end of the challenge. Week 4:Community MembersSolutionsSuper UsersSolutionsPower Automate Deenuji11FLMike31Sayan11ManishSolanki16VishnuReddy199710creativeopinion14Akshansh-Sharma3SudeepGhatakNZ7claudiovc2CFernandes5 misc2Nived_Nambiar5 Usernametwice232rzaneti5 eetuRobo2   Anil_g2   SharonS2  

Check Out | 2024 Release Wave 2 Plans for Microsoft Dynamics 365 and Microsoft Power Platform

On July 16, 2024, we published the 2024 release wave 2 plans for Microsoft Dynamics 365 and Microsoft Power Platform. These plans are a compilation of the new capabilities planned to be released between October 2024 to March 2025. This release introduces a wealth of new features designed to enhance customer understanding and improve overall user experience, showcasing our dedication to driving digital transformation for our customers and partners.    The upcoming wave is centered around utilizing advanced AI and Microsoft Copilot technologies to enhance user productivity and streamline operations across diverse business applications. These enhancements include intelligent automation, AI-powered insights, and immersive user experiences that are designed to break down barriers between data, insights, and individuals. Watch a summary of the release highlights.    Discover the latest features that empower organizations to operate more efficiently and adaptively. From AI-driven sales insights and customer service enhancements to predictive analytics in supply chain management and autonomous financial processes, the new capabilities enable businesses to proactively address challenges and capitalize on opportunities.    

Updates to Transitions in the Power Platform Communities

We're embarking on a journey to enhance your experience by transitioning to a new community platform. Our team has been diligently working to create a fresh community site, leveraging the very Dynamics 365 and Power Platform tools our community advocates for.  We started this journey with transitioning Copilot Studio forums and blogs in June. The move marks the beginning of a new chapter, and we're eager for you to be a part of it. The rest of the Power Platform product sites will be moving over this summer.   Stay tuned for more updates as we get closer to the launch. We can't wait to welcome you to our new community space, designed with you in mind. Let's connect, learn, and grow together.   Here's to new beginnings and endless possibilities!   If you have any questions, observations or concerns throughout this process please go to https://aka.ms/PPCommSupport.   To stay up to date on the latest details of this migration and other important Community updates subscribe to our News and Announcements forums: Copilot Studio, Power Apps, Power Automate, Power Pages

Users online (3,502)