>say i've got yyyy/mm/dd or yy/mm/dd or mm/yy/dd or mm/yyyy/dd
>i 've to do calculations on year part and return the date in the same format as it was given to the function.

You can use GOMONTH() or convert the date to a string with DTOC(), cut out the year using RIGHT or LEFT, do your operation then rebuild the string and convert it back to a date using CTOD(). I prefer to just use GOMONTH() and pass a value 12 times the number of years I want to move. I did this to calculate the Thai year which is 2541. ;)

Eric K.