Many Power Automate users encounter issues with the dateDifference() function when calculating the difference between two dates. The problem arises when the output format varies depending on the duration, causing errors in extracting Days, Hours, Minutes, and Seconds.

This blog provides a robust and easy-to-implement solution that works seamlessly in all scenarios, including durations less than a day. Learn how to use a single expression with conditional logic to avoid these common pitfalls and ensure your date calculations are accurate every time. This is your ultimate fix for handling dateDifference() errors!

1. The Flow
   1. dateDifference expression
      1. How it works
   2. Steps to Access Each Value
2. Download my Flow
   1. Classic designer
   2. New designer
3. Conclusion

The Flow

1. Compose action: named StartDate = 2024-12-10T15:58:28
2. Compose action: named EndDate = 2024-12-10T19:22:20
3. Compose action: uses dateDifference() expression. see below

Below is the expression used in the ‘Date Difference’ compose action. It dynamically handles all scenarios—when days are included and when they are not (same with hours and minutes).

dateDifference expression

Create a compose action for StartDate and EndDate

if(
   contains(
     dateDifference(outputs('StartDate'), outputs('EndDate')), 
     '.'
   ),
   json(
     concat(
       '{"Days":', string(int(split(dateDifference(outputs('StartDate'), outputs('EndDate')), '.')[0])),
       ',"Hours":', string(int(split(split(dateDifference(outputs('StartDate'), outputs('EndDate')), '.')[1], ':')[0])),
       ',"Minutes":', string(int(split(split(dateDifference(outputs('StartDate'), outputs('EndDate')), '.')[1], ':')[1])),
       ',"Seconds":', string(int(split(split(dateDifference(outputs('StartDate'), outputs('EndDate')), '.')[1], ':')[2])),
       '}'
     )
   ),
   json(
     concat(
       '{"Days":0',
       ',"Hours":', string(int(split(dateDifference(outputs('StartDate'), outputs('EndDate')), ':')[0])),
       ',"Minutes":', string(int(split(dateDifference(outputs('StartDate'), outputs('EndDate')), ':')[1])),
       ',"Seconds":', string(int(split(dateDifference(outputs('StartDate'), outputs('EndDate')), ':')[2])),
       '}'
     )
   )
)

How it works

• The if() function checks if the dateDifference() result contains a . (dot).
• If it does, it means the result has a days component (e.g., 1268.04:15:30), so we parse out Days, Hours, Minutes, and Seconds accordingly.
• If it does not, it means the result is less than a day (e.g., 12:57:47.2544602), so we treat Days as 0 and parse Hours, Minutes, and Seconds directly from the string.

Result:

This will produce a JSON object like:
{
"Days": 1268,
"Hours": 4,
"Minutes": 15,
"Seconds": 30
}
Or
{
"Days": 0,
"Hours": 12,
"Minutes": 57,
"Seconds": 47
}

Steps to Access Each Value

If you use the fixed expression directly in a Compose action (e.g., named Date_Difference), you can reference the fields like this:

• Days: outputs('Date_Difference')?['Days']
• Hours: outputs('Date_Difference')?['Hours']
• Minutes: outputs('Date_Difference')?['Minutes']
• Seconds: outputs('Date_Difference')?['Seconds']

Use these expressions in subsequent actions (like another Compose, a Condition, or Apply to Each) to reference the specific values.

Download my Flow

You can easily copy and paste actions in Power Automate. Allowing you to copy and paste my example.

1. Classic designer
2. New designer

Classic designer

Step 1: Copy the code snippet

{"id":"b6b531e2-b7b5-4a9e-86bd-7e2a069529a0","brandColor":"#8C3900","connectionReferences":{},"connectorDisplayName":"Control","icon":"data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMzIiIGhlaWdodD0iMzIiIHZlcnNpb249IjEuMSIgdmlld0JveD0iMCAwIDMyIDMyIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPg0KIDxwYXRoIGQ9Im0wIDBoMzJ2MzJoLTMyeiIgZmlsbD0iIzhDMzkwMCIvPg0KIDxwYXRoIGQ9Im04IDEwaDE2djEyaC0xNnptMTUgMTF2LTEwaC0xNHYxMHptLTItOHY2aC0xMHYtNnptLTEgNXYtNGgtOHY0eiIgZmlsbD0iI2ZmZiIvPg0KPC9zdmc+DQo=","isTrigger":false,"operationName":"Get_date_difference_object","operationDefinition":{"type":"Scope","actions":{"StartDate":{"type":"Compose","inputs":"2024-12-10T15:58:28","runAfter":{}},"EndDate":{"type":"Compose","inputs":"2024-12-10T19:22:20","runAfter":{"StartDate":["Succeeded"]}},"Date_Difference":{"type":"Compose","inputs":"@if(\r\n   contains(\r\n     dateDifference(outputs('StartDate'), outputs('EndDate')), \r\n     '.'\r\n   ),\r\n   json(\r\n     concat(\r\n       '{\"Days\":', string(int(split(dateDifference(outputs('StartDate'), outputs('EndDate')), '.')[0])),\r\n       ',\"Hours\":', string(int(split(split(dateDifference(outputs('StartDate'), outputs('EndDate')), '.')[1], ':')[0])),\r\n       ',\"Minutes\":', string(int(split(split(dateDifference(outputs('StartDate'), outputs('EndDate')), '.')[1], ':')[1])),\r\n       ',\"Seconds\":', string(int(split(split(dateDifference(outputs('StartDate'), outputs('EndDate')), '.')[1], ':')[2])),\r\n       '}'\r\n     )\r\n   ),\r\n   json(\r\n     concat(\r\n       '{\"Days\":0',\r\n       ',\"Hours\":', string(int(split(dateDifference(outputs('StartDate'), outputs('EndDate')), ':')[0])),\r\n       ',\"Minutes\":', string(int(split(dateDifference(outputs('StartDate'), outputs('EndDate')), ':')[1])),\r\n       ',\"Seconds\":', string(int(split(dateDifference(outputs('StartDate'), outputs('EndDate')), ':')[2])),\r\n       '}'\r\n     )\r\n   )\r\n)","runAfter":{"EndDate":["Succeeded"]},"metadata":{"operationMetadataId":"03c8d578-576a-41a3-8d63-609a15ce594b"}}},"runAfter":{"Add_to_time":["Succeeded"]}}}

---

New designer

Step 1: Copy the code snippet

{"nodeId":"Get_date_difference_object-copy","serializedOperation":{"type":"Scope","actions":{"StartDate":{"type":"Compose","inputs":"2024-12-10T15:58:28"},"EndDate":{"type":"Compose","inputs":"2024-12-10T19:22:20","runAfter":{"StartDate":["Succeeded"]}},"Date_Difference":{"type":"Compose","inputs":"@if(\r\n   contains(\r\n     dateDifference(outputs('StartDate'), outputs('EndDate')), \r\n     '.'\r\n   ),\r\n   json(\r\n     concat(\r\n       '{\"Days\":', string(int(split(dateDifference(outputs('StartDate'), outputs('EndDate')), '.')[0])),\r\n       ',\"Hours\":', string(int(split(split(dateDifference(outputs('StartDate'), outputs('EndDate')), '.')[1], ':')[0])),\r\n       ',\"Minutes\":', string(int(split(split(dateDifference(outputs('StartDate'), outputs('EndDate')), '.')[1], ':')[1])),\r\n       ',\"Seconds\":', string(int(split(split(dateDifference(outputs('StartDate'), outputs('EndDate')), '.')[1], ':')[2])),\r\n       '}'\r\n     )\r\n   ),\r\n   json(\r\n     concat(\r\n       '{\"Days\":0',\r\n       ',\"Hours\":', string(int(split(dateDifference(outputs('StartDate'), outputs('EndDate')), ':')[0])),\r\n       ',\"Minutes\":', string(int(split(dateDifference(outputs('StartDate'), outputs('EndDate')), ':')[1])),\r\n       ',\"Seconds\":', string(int(split(dateDifference(outputs('StartDate'), outputs('EndDate')), ':')[2])),\r\n       '}'\r\n     )\r\n   )\r\n)","runAfter":{"EndDate":["Succeeded"]},"metadata":{"operationMetadataId":"03c8d578-576a-41a3-8d63-609a15ce594b"}}},"runAfter":{"Add_to_time":["Succeeded"]}},"allConnectionData":{},"staticResults":{},"isScopeNode":true,"mslaNode":true}

Step 2: In Power Automate click the + to add an action. Click Paste an action

Conclusion

That’s it! pretty easy right? if you encounter any issues, comment below!