A jQuery UI Datepicker widget with Twitter Bootstrap theme. It's based on jQuery UI 1.9.1 and Twitter Bootstrap 2.1.1.
See demo page for more examples.
<input type="text" name="date" class="datepicker" />
<script>
$(document).ready(function() {
$(".datepicker").datepicker();
});
</script>
Using fancy bootstrap input/button combo:
<div class="control-group">
<label class="control-label" for="datepicker">Date</label>
<div class="controls">
<div class="input-append">
<input id="datepicker" class="input-small" type="text">
<button id="datepickerbtn" class="btn" type="button"><i class="icon-calendar"></i></button>
</div>
</div>
</div>
<script>
$(document).ready(function() {
$("#datepicker").datepicker();
$("#datepickerbtn").click(function(event) {
event.preventDefault();
$("#datepicker").focus();
})
});
</script>