I have
<input required type="text" placeholder="yyyy/mm/dd" id="fecha_form" name="fecha_form">
And it seems like:
we can do this by these lines of css
::-webkit-input-placeholder {
text-align: center;
}
:-moz-placeholder { /* For Firefox 18- */
text-align: center;
}
::-moz-placeholder { /* For Firefox 19+ */
text-align: center;
}
:-ms-input-placeholder {
text-align: center;
}
hope this will solve your problem