There is a html5 datepicker inside my website, the problem is the placeholder is default by the computer locale, but in fact my website support multi-language, e.g. English/ Japanese /etc... so I wonder how can I change the placeholder, and if it is unfeasible , then how can I hide the placeholder?
Thanks for helping
Update: html code (the datepicker is generate by a ContactForm7 plugin in wordpress, but it seems very similar to native html5 one)
<input type="date" name="date" value="" class="wpcf7-form-control wpcf7-date wpcf7-validates-as-date required" min="2015-03-18" aria-invalid="false">