Hey Dora what sort of Date picker are you thinking of? You can create a date parameter and then tie that to a calculated field. If you have a date field in your data, you can stick that on the filter shelf and then pick dates from it. Dates can be visualized in a lot of different ways, so can you give us a bit more of a clue as to what you're looking for? Some sort of sample workbook or sample data would be great!
Thanks Shawn. I got it now. I have a date column in the table and I added to the filter shelf and it worked fine.