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How to exclude the week ends when calulating the due date

Hi All,

I have created a workflow using flow. Based on the approved date, I want to calculate the due date .

Calulation -> duedate = Approved date + 9 days(only working 9 days)

 

I have used the following logic - but I m getting an incorrect date, can someone please help me on this.

https://sharepointgurus.net/microsoft-flow-formula-calculate-due-date-excluding-weekends/

 

if(equals(dayOfWeek(adddays(if(equals(dayOfWeek(variables('startdate')),6),addDays(variables('startdate'),2), if(equals(dayOfWeek(variables('startdate')),0), adddays(variables('startdate'),1),variables('startdate'))), add(mul(7,div(variables('duration'),5)), mod(variables('duration'),5)))),6), addDays(adddays(if(equals(dayOfWeek(variables('startdate')),6), addDays(variables('startdate'),2), if(equals(dayOfWeek(variables('startdate')),0), adddays(variables('startdate'),1),variables('startdate'))), add(mul(7,div(variables('duration'),5)), mod(variables('duration'),5))),2), if(equals(dayOfWeek(adddays(if(equals(dayOfWeek(variables('startdate')),6), addDays(variables('startdate'),2), if(equals(dayOfWeek(variables('startdate')),0), adddays(variables('startdate'),1),variables('startdate'))), add(mul(7,div(variables('duration'),5)), mod(variables('duration'),5)))),0), adddays(adddays(if(equals(dayOfWeek(variables('startdate')),6), addDays(variables('startdate'),2), if(equals(dayOfWeek(variables('startdate')),0), adddays(variables('startdate'),1),variables('startdate'))), add(mul(7,div(variables('duration'),5)), mod(variables('duration'),5))),1), adddays(if(equals(dayOfWeek(variables('startdate')),6), addDays(variables('startdate'),2), if(equals(dayOfWeek(variables('startdate')),0), adddays(variables('startdate'),1),variables('startdate'))), add(mul(7,div(variables('duration'),5)), mod(variables('duration'),5)))))

 

See my output - due date is calculated incorrectly 

flow1.png

 

1 ACCEPTED SOLUTION

Accepted Solutions
manuelstgomes
Community Champion
Community Champion

Hi @Vidanaw 

 

I had the same issue in the past and build complex formulas as well, but there's an easier way to achieve that using Excel. 

 

If you try to do it based on complex formulas, you'll always get situations with leap years, holidays, or other exceptions that will screw-up the math. Besides, Excel already does all the math for us so let's use it 🙂

 

The idea is the following. Have a table in Excel that calculates that. Save a new record, fetch it again (with the calculated value) and use it. 

 

I created it with the Request trigger so that I can re-use it in other Power Automations.

 

Here's the Power Automation.

 

small-Screenshot_2019-11-22_at_10_45_55.jpgsmall-Screenshot_2019-11-22_at_10_46_14.jpg

 

Notice that I create a random number. Since I don't want Excel to store the values I delete the entry once I don't need it anymore.

 

You can find the Excel here. Just put it in a SharePoint or in OneDrive and reference it in the process.

 

Does it make sense?

If I have answered your question, please mark your post as Solved.
If you like my response, please give it a Thumbs Up.

Cheers
Manuel

View solution in original post

5 REPLIES 5
manuelstgomes
Community Champion
Community Champion

Hi @Vidanaw 

 

I had the same issue in the past and build complex formulas as well, but there's an easier way to achieve that using Excel. 

 

If you try to do it based on complex formulas, you'll always get situations with leap years, holidays, or other exceptions that will screw-up the math. Besides, Excel already does all the math for us so let's use it 🙂

 

The idea is the following. Have a table in Excel that calculates that. Save a new record, fetch it again (with the calculated value) and use it. 

 

I created it with the Request trigger so that I can re-use it in other Power Automations.

 

Here's the Power Automation.

 

small-Screenshot_2019-11-22_at_10_45_55.jpgsmall-Screenshot_2019-11-22_at_10_46_14.jpg

 

Notice that I create a random number. Since I don't want Excel to store the values I delete the entry once I don't need it anymore.

 

You can find the Excel here. Just put it in a SharePoint or in OneDrive and reference it in the process.

 

Does it make sense?

If I have answered your question, please mark your post as Solved.
If you like my response, please give it a Thumbs Up.

Cheers
Manuel

@manuelstgomes  Thank you very much, I ll try this. But it is really disappointing that we have to use such a complex mechanism to calculate this. In the future, I hope Flow will provide some functionality to do this easily.

I have noticed that the function that I have used is working for any day within the week except Thursday and Friday if the approved date is Thursday or Friday the calculation always 2 days behind.

 

Once again thank you for your suggestion, I ll try this and get back to you.

HI @Vidanaw 

 

Yeah it's super hacky and convoluted.. Hopefully this will get fixed soon.

 

If in the future you find a nicer solution please let me know so that I can implement it on my side.

 

Cheers

If I have answered your question, please mark your post as Solved.
If you like my response, please give it a Thumbs Up.

Cheers
Manuel

@manuelstgomes  thanks your solution is working. yes definitely if I build a function I ll let you know. I m thinking Azure function is a much better option. 

@Vidanaw 

 

Azure function is an awesome idea!!! 

 

If I have answered your question, please mark your post as Solved.
If you like my response, please give it a Thumbs Up.

Cheers
Manuel

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