I have a simple Condition Statement that checks if the item date entered by the user falls between two dates. I have entered the values and each time I run the workflow, the Condition statement is subtracting a day off of each end.
In the example attached, I entered 6/30 for the first value and 7/15 for the second value. The next time I run the workflow and go back into edit mode of the workflow, the values have changed to 6/29 and 7/14.