Welcome to add or Subtract Date Calculator. In order to use this calculator please select the date then enter days in either Add days input field or subtract days input field in order to add or subtract total days from the given date. You will not be able to enter both add or subtract days at once. If you want to use both the functionalites then use one by one and click reset button to start again. In Order to Reset and start everything from again please reload the page from your browser.