title: jQuery Datepicker Input Box Set To 01-01-1970 When Empty
body: <p>guys i have an issue with Datepicker in my input box, labelled "Order Date".
  Here is my input field :
  <img src="https://i.stack.imgur.com/vfPt2.png" alt="my input field with labelled &quot;Order Date&quot;"></p>
  
  <p>When my form is submitted with a blank date field, it automatically get sets to 01-01-1970.</p>
  
  <p>Like this :
  <img src="https://i.stack.imgur.com/GkG6q.png" alt="After submitting the form with a blank field"></p>
  
  <p>So, here what i want is when i submitted my form with a blank field it should be set to blank rather than 01-01-1970.
  Any help would be appreciated. Thank you.</p>