Alter the output of a specific WooCommerce My Account column, in this case replacing the date format used for displaying the order date.

filter-woocommerce-myaccount-order-date.php

<?php
/**
 * Alter the date order output (in this case, the format of the displayed date).
 *
 * @param object $order
 */
add_action( 'woocommerce_my_account_my_orders_column_order-date', 'alter_order_date_format', 10, 1 );
function alter_order_date_format( $order ) {

	echo '<time datetime="' . date( 'Y-m-d', strtotime( $order->order_date ) ) . '" title="' .  esc_attr( strtotime( $order->order_date ) ) . '">' . date_i18n( 'm/d/Y', strtotime( $order->order_date ) ) . '</time>';

}