You can use DateTime>Assign to convert the strings to DateTime variables, and then use the DateTime>IsBefore and IsAfter Actions.

Purely as a shortcut, you can use the If>Legacy Automation>Comparison Condition to compare them As-Is without doing the conversion. The first way would be more "best practice"

HI @Jeremiah Logan​ 

Thank you for the explanation ,

can you share an example of date time conversion

Can we use the datetime string assign option?

Sorry for the delay on getting back to you. So yes, you can use the DateTime>Assign option, it is one of several ways you could accomplish this. Here is a real simple workflow that works for me, may not be 100% what you're looking to do, but should give you an idea of how you can tackle your task.

Here is my sample Excel spreadsheet data:

In the bot, open with Excel Basic > Open, then loop through all rows with Excel Basic > 'For each row in worksheet'.

On each row, use Datetime:Assign to assign the DueDate and PayDate strings to two different DateTime variables, using a custom format:

Use Datetime > Is After to create a Boolean variable and determine whether the PayDate is after the DueDate:

Then a simple If > Boolean > statement. If bPaidLate = True, pop up a message box that a late fee will be assessed, Else pop up a message that the customer paid on time.

Thank You @Jeremiah Logan​