J2Store Booking: Loading default date in date fields

date-picker.php

<?php

$month_before_day = strpos( ( 'F j, Y' ), 'F' ) < strpos( ( 'F j, Y' ), 'j' );
?>
<fieldset class="bookings-date-picker bookings-date-picker-<?php echo $vars->product_type; ?> <?php echo implode( ' ', (array)$vars->field->class ); ?>" data-appid="<?php echo $vars->id; ?>">
	<legend>
		<span class="label"><?php echo isset($vars->field->label) ? $vars->field->label: ''; ?></span>: <small class="bookings-date-picker-choose-date"><?php echo JText::_( 'Choose...' ); ?></small>
	</legend>

	<div class="picker" data-display="<?php echo $vars->field->display; ?>" data-duration-unit="<?php echo $vars->field->duration_unit;?>" data-availability='<?php echo json_encode( $vars->field->availability_rules ) ; ?>'
		 data-default-availability="<?php echo $vars->field->default_availability ? 'true' : 'false'; ?>" data-fully-booked-days='<?php echo json_encode( $vars->field->fully_booked_days ); ?>'
		 data-partially-booked-days='<?php echo json_encode( $vars->field->partially_booked_days ); ?>' data-buffer-days='<?php echo json_encode( $vars->field->buffer_days ); ?>'
		 data-min_date="<?php echo ! empty( $vars->field->min_date_js ) ? $vars->field->min_date_js : 0; ?>" data-max_date="<?php echo $vars->field->max_date_js; ?>"
		 data-default_date="<?php echo $vars->field->default_date; ?>" data-is_range_picker_enabled="<?php echo $vars->field->is_range_picker_enabled ? 1 : 0; ?>"></div>

	<div class="bookings-date-picker-date-fields">
		<?php if ( 'customer' == $vars->field->duration_type && $vars->field->is_range_picker_enabled ) : ?>
			<span><?php echo JText::_( 'J2STORE_APPBOOKINGPRODUCT_START_DATE' ); ?>:</span><br />
		<?php endif; ?>

		<?php
        $day = $month = $year = '';
        if(!empty($vars->field->default_date)){
            $timestamp = strtotime($vars->field->default_date);
            $day = date('d', $timestamp);
            $month = date('m', $timestamp);
            $year = date('Y', $timestamp);
        }

		if ( $month_before_day  ) : ?>
		<label>
			<input type="text" name="<?php echo $vars->field->name; ?>_month" placeholder="<?php echo JText::_( 'mm' ); ?>" value="<?php echo $month; ?>"  size="2" class="booking_date_month" />
			<br/><span><?php echo JText::_( 'J2STORE_BOOKING_MONTH_FIELD' ); ?></span>
		</label> / <label>
			<input type="text" name="<?php echo $vars->field->name; ?>_day" placeholder="<?php echo JText::_( 'dd' ); ?>" value="<?php echo $day; ?>" size="2" class="booking_date_day" />
				<br/><span><?php echo JText::_( 'J2STORE_BOOKING_DAY_FIELD' ); ?></span>
		</label>
		<?php else : ?>
		<label>
			<input type="text" name="<?php echo $vars->field->name; ?>_day" placeholder="<?php echo JText::_( 'dd' ); ?>" value="<?php echo $day; ?>" size="2" class="booking_date_day" />
			<br/><span><?php echo JText::_( 'J2STORE_BOOKING_DAY_FIELD' ); ?></span>
		</label> / <label>
			<input type="text" name="<?php echo $vars->field->name; ?>_month" placeholder="<?php echo JText::_( 'mm' ); ?>" value="<?php echo $month; ?>" size="2" class="booking_date_month" />
				<br/><span><?php echo JText::_( 'J2STORE_BOOKING_MONTH_FIELD' ); ?></span>
		</label>
		<?php endif; ?> / <label>
			<input type="text" value="<?php echo $year; ?>" name="<?php echo $vars->field->name; ?>_year" placeholder="<?php echo JText::_( 'YYYY' ); ?>" size="4" class="booking_date_year" />
			<br/><span><?php echo JText::_( 'J2STORE_BOOKING_YEAR_FIELD' ); ?></span>
		</label>
	</div>

	<?php if ( 'customer' == $vars->field->duration_type && $vars->field->is_range_picker_enabled ) : ?>
		<div class="bookings-date-picker-date-fields">
			<span><?php echo JText::_( 'J2STORE_APPBOOKINGPRODUCT_END_DATE' ); ?>:</span><br />
			<?php if ( $month_before_day ) : ?>
			<label>
				<input type="text" name="<?php echo $vars->field->name; ?>_to_month" placeholder="<?php echo JText::_( 'mm' ); ?>" value="02" size="2" class="booking_to_date_month" />
				<br/><span><?php echo JText::_( 'J2STORE_BOOKING_MONTH_FIELD' ); ?></span>
			</label> / <label>
				<input type="text" name="<?php echo $vars->field->name; ?>_to_day" placeholder="<?php echo JText::_( 'dd' ); ?>" value="07" size="2" class="booking_to_date_day" />
				<br/><span><?php echo JText::_( 'J2STORE_BOOKING_DAY_FIELD' ); ?></span>
			</label>
			<?php else : ?>
			<label>
				<input type="text" name="<?php echo $vars->field->name; ?>_to_day" placeholder="<?php echo JText::_( 'dd' ); ?>" size="2" class="booking_to_date_day" />
				<br/><span><?php echo JText::_( 'J2STORE_BOOKING_DAY_FIELD' ); ?></span>
			</label> / <label>
				<input type="text" name="<?php echo $vars->field->name; ?>_to_month" placeholder="<?php echo JText::_( 'mm' ); ?>" size="2" class="booking_to_date_month" />
					<br/><span><?php echo JText::_( 'J2STORE_BOOKING_MONTH_FIELD' ); ?></span>
			</label>
			<?php endif; ?> / <label>
				<input type="text" name="<?php echo $vars->field->name; ?>_to_year" placeholder="<?php echo JText::_( 'YYYY' ); ?>" value="2022" size="4" class="booking_to_date_year" />
				<br/><span><?php echo JText::_( 'J2STORE_BOOKING_YEAR_FIELD' ); ?></span>
			</label>
		</div>
	<?php endif; ?>
	<input type="hidden" name="duration_type" value="<?php echo $vars->field->duration_type; ?>"/>
	<input type="hidden" name="block_quantity" class="block_quantity" value="1"/>
	<div class="hide booking_date_msg alert alert-block alert-info"></div>
</fieldset>