Order Date

You can use following code. Add this to theme’s functions.php file.

function wpg_add_columns($cols) {

	$cols['wc_settings_tab_order_date'] = __('Order Date', 'mytheme');
	return $cols;
}
add_filter('wpg_order_columns', 'wpg_add_columns');

function wpg_add_fields($settings) {

	$settings['payment_method'] = array(
								'name' => __( 'Order date', 'woocommerce-simply-order-export' ),
								'type' => 'checkbox',
								'desc' => __( 'Order date', 'woocommerce-simply-order-export' ),
								'id'   => 'wc_settings_tab_order_date'
							);

	return $settings;

}
add_filter('wc_settings_tab_order_export', 'wpg_add_fields');

function csv_write( &$csv, $od, $field ) {

	switch( $field ) {

		case 'wc_settings_tab_order_date':
			array_push( $csv, $od->order_date );
		break;

		default :
			break;
	}

}
add_action('wpg_add_values_to_csv', 'csv_write', 10, 3);

This is working snippet.

Thank you, that worked.

In the above code$settings['payment_method'] = array(
Should it instead be $settings['order_date'] = array(
?

Yes you are right.. It’s my mistake.