Post Date block: Address feedback (#70982)

* Block bindings: Translate core/post-data source labels
* Use epoch to compare dates
* Add to backport changelog

Author: ockham

backport-changelog/6.9/9299.md

@@ -1,3 +1,4 @@
 https://github.com/WordPress/wordpress-develop/pull/9299
 
-* https://github.com/WordPress/gutenberg/pull/70585
+* https://github.com/WordPress/gutenberg/pull/70585
+* https://github.com/WordPress/gutenberg/pull/70982

lib/compat/wordpress-6.9/post-data-block-bindings.php

@@ -40,7 +40,7 @@ function gutenberg_block_bindings_post_data_get_value( array $source_args, $bloc
 
 	if ( 'modified' === $source_args['key'] ) {
 		// Only return the modified date if it is later than the publishing date.
-		if ( get_the_modified_date( 'Ymdhi', $post_id ) > get_the_date( 'Ymdhi', $post_id ) ) {
+		if ( get_the_modified_date( 'U', $post_id ) > get_the_date( 'U', $post_id ) ) {
 			return esc_attr( get_the_modified_date( 'c', $post_id ) );
 		} else {
 			return '';

packages/editor/src/bindings/post-data.js

@@ -1,6 +1,7 @@
 /**
  * WordPress dependencies
  */
+import { __ } from '@wordpress/i18n';
 import { store as coreDataStore } from '@wordpress/core-data';
 
 /**
@@ -41,12 +42,12 @@ function getPostDataFields( select, context ) {
 		);
 		dataFields = {
 			date: {
-				label: 'Post Date',
+				label: __( 'Post Date' ),
 				value: entityDataValues?.date,
 				type: 'string',
 			},
 			modified: {
-				label: 'Post Modified Date',
+				label: __( 'Post Modified Date' ),
 				value: entityDataValues?.modified,
 				type: 'string',
 			},