Hello Prakash,
If your requirement is to find the latest date in a date dimension field in report level, create a variable which calculates daysbetween each date value and current date. take the date which has the minimum value of new variable value, which will give you the latest date. So you don't have to use max() function in date field at all.
Let me know if its feasible in your requirement.
Regards,
Nikhil Joy