@Maheswar Reddy B  There is no out of the box Clear button in the Pega date or datetime picker in Cosmos or Constellation. Users can still clear a date by placing the cursor in the field and pressing Backspace or Delete, but this only works if the property is optional. To support that, mark the field as not required and make sure there is no edit validate that rejects blanks. If you want a visible Clear without heavy customization, add a tiny link or icon next to the field with a simple action set that does Set value of .YourDateProp to an empty string and then Refresh this section or field. In your pre or post processing data transform, convert empty string to null using when .YourDateProp equals “” then Property-Remove. That keeps upgrade risk low and avoids custom controls. Add helper text like Press Delete to clear if you prefer no extra UI. If you need this pattern everywhere, log an enhancement request to add a Clear option beside Today and Close.