Why do you not want to answer this thread?(Your answer will be sent to Jeanette and Aytekin)
i.e the user ticked "select my own date" and the date picker form element appears.Thanks Jack
Using Conditional Logic on Forms to achieved this.
Please take a look my sample form: http://www.jotform.me/form/21175426132445
Hope this help and if you need further assistance, feel free to contact us again anytime.