jQuery date picker problem in Safari
Although there is no native datepicker for Safari (or IE) a pretty good workaround is to add a placeholder attribute to the date input. This informs Safari and IE users which format the fallback text input should be (which is yyyy-mm-dd). The placeholder doesn't display on browsers that support type=date
so this workaround won't affect other browsers.
e.g. <input type="date" placeholder="yyyy-mm-dd" />