Skip to main content
cancel
Showing results for
Search instead for
Did you mean:

Find everything you need to get certified on Fabric—skills challenges, live sessions, exam prep, role guidance, and more. Get started

Resolver I

## Calculate difference between two dates power query

How do I calculate the difference between two dates in Power Query M code (not DAX)?  I'm looking for the number of days.

1 ACCEPTED SOLUTION
Solution Sage

you need to use the duration functions: https://docs.microsoft.com/en-us/powerquery-m/duration-days

=each Duration.Days([Date1] - [Date2])

Did I answer your question correctly? Mark my answer as a solution!

Proud to be a Datanaut!

11 REPLIES 11
Resolver III

Source Data

Replacing null by 0 in sctotal and invvalue columns

Added new SCDate Column

Added new INVDate column

Added list of days or calendar column

Added final value per day column

Expanded the calendar and loaded it.

Use the calendar in slicer and final value column in card.

If your expectation is met the pls accept the solution.

Helper V

jshutters,

Good question. Your question depends on the following:

1. Do you need the number of days between 2 dates?

Use Duration.Days ( [EndDate] - [StartDate] ) +1
2. Do you need the number of weekdays between 2 dates?

Generate a list of dates between start and enddate, and remove the weekends. Count the number of days left in your list.

3. Do you need working days between 2 dates?

Generate a list of dates between start and enddate, remove weekends and holidays. Then count the number of days left in your list.

For 2 and 3 I'll just drop this blog here so you can read the details. It's a bit more complex but replicates the DATEDIFF function for the M language:

https://gorilla.bi/power-query/working-days-between-dates/

Cheers!

Rick

--------------------------------------------------

@ me in replies or I'll lose your thread

Master Power Query M? -> https://powerquery.how

Read in-depth articles? -> BI Gorilla

Youtube Channel: BI Gorilla

If this post helps, then please consider accepting it as the solution to help other members find it more quickly.

New Member

Hello

How do I calculate the years between 2 dates on power query M coding?

Date formate is e.g. 2022-12-10

Resolver I

J2008F, to calculate the years between 2 dates, you can use the Date.Year function in M coding.  For example, Date.Year(<insert name of column2>) - Date.Year(<insert name of column1>)

New Member

A further queston on Duration.Days, the formula Duration.Days([Date1] - [Date2]) did not cater both date inclusive situation. Is there any way to modify the formula for both date inclusve situation?

Example, The Duration.Days formula gives 6 for days between 2022/02/22 and 2022/02/28, but it should be 7 if both date inclusive.

Frequent Visitor

Just add one day to the first date: Duration.Days(Date.AddDays([Date1],1) - [Date2])

Or just add one to the result: Duration.Days([Date1] - [Date2])+1

Advocate I

One note: I kept receiving errors on the [Date1] - [Date2] until I explicitly converted my date values to a date using Date.From(): e.g. (for an aging calculation)

= Duration.Days(Date.From(DateTime.LocalNow()) - Date.From([Due_Date]))

Frequent Visitor

Hello is it possible to calculate number of days using date that I specify. I need to calculate number of day between August 31, 2021 and some Due date I have in data. When I use this formula Duration.Days(Date.From(2021-08-31) - Date.From([DEB_DAT])), it returns strange result.

Thanks for help

Resolver II

Hi, you can find the solution in this post.

http://blog.iwco.co/2018/12/07/numero-de-dias-entre-dos-fechas-power-query-m/

Regards

John Bocachica
Senior BI Consultant
Information Workers
http://www.iwco.co
Solution Sage

you need to use the duration functions: https://docs.microsoft.com/en-us/powerquery-m/duration-days

=each Duration.Days([Date1] - [Date2])

Did I answer your question correctly? Mark my answer as a solution!

Proud to be a Datanaut!

Regular Visitor

In similar cases is better to use DAX or PowerQuery to this calculations?

Can anyone write advantages and disadventages this two ways of solving similar cases?

## Helpful resources

Announcements

#### Europe’s largest Microsoft Fabric Community Conference

Join the community in Stockholm for expert Microsoft Fabric learning including a very exciting keynote from Arun Ulag, Corporate Vice President, Azure Data.

#### Power BI Monthly Update - August 2024

Check out the August 2024 Power BI update to learn about new features.

#### Microsoft Fabric & AI Learning Hackathon

Learn from experts, get hands-on experience, and win awesome prizes.

#### Fabric Community Update - September 2024

Find out what's new and trending in the Fabric Community.

Top Solution Authors
Top Kudoed Authors