diff --git a/src/wp-includes/html-api/class-wp-css-attribute-selector.php b/src/wp-includes/html-api/class-wp-css-attribute-selector.php
index fbdef5ce930be..7543cb834e820 100644
--- a/src/wp-includes/html-api/class-wp-css-attribute-selector.php
+++ b/src/wp-includes/html-api/class-wp-css-attribute-selector.php
@@ -4,7 +4,7 @@
  *
  * @package WordPress
  * @subpackage HTML-API
- * @since TBD
+ * @since 6.8.0
  */
 
 /**
@@ -12,7 +12,7 @@
  *
  * This class is used to test for matching HTML tags in a {@see WP_HTML_Tag_Processor}.
  *
- * @since TBD
+ * @since 6.8.0
  *
  * @access private
  */
diff --git a/src/wp-includes/html-api/class-wp-css-class-selector.php b/src/wp-includes/html-api/class-wp-css-class-selector.php
index 02410546a4b52..fa287cdf5c580 100644
--- a/src/wp-includes/html-api/class-wp-css-class-selector.php
+++ b/src/wp-includes/html-api/class-wp-css-class-selector.php
@@ -4,7 +4,7 @@
  *
  * @package WordPress
  * @subpackage HTML-API
- * @since TBD
+ * @since 6.8.0
  */
 
 /**
@@ -12,7 +12,7 @@
  *
  * This class is used to test for matching HTML tags in a {@see WP_HTML_Tag_Processor}.
  *
- * @since TBD
+ * @since 6.8.0
  *
  * @access private
  */
diff --git a/src/wp-includes/html-api/class-wp-css-complex-selector-list.php b/src/wp-includes/html-api/class-wp-css-complex-selector-list.php
index 4a9fc03f582f8..fcc6032589584 100644
--- a/src/wp-includes/html-api/class-wp-css-complex-selector-list.php
+++ b/src/wp-includes/html-api/class-wp-css-complex-selector-list.php
@@ -4,7 +4,7 @@
  *
  * @package WordPress
  * @subpackage HTML-API
- * @since TBD
+ * @since 6.8.0
  */
 
 /**
@@ -28,7 +28,7 @@
  *   - Next sibling (`el + el`)
  *   - Subsequent sibling (`el ~ el`)
  *
- * @since TBD
+ * @since 6.8.0
  *
  * @access private
  */
@@ -37,7 +37,7 @@ class WP_CSS_Complex_Selector_List extends WP_CSS_Compound_Selector_List impleme
 	 * Takes a CSS selector string and returns an instance of itself or `null` if the selector
 	 * string is invalid or unsupported.
 	 *
-	 * @since TBD
+	 * @since 6.8.0
 	 *
 	 * @param string $input CSS selectors.
 	 * @return static|null
diff --git a/src/wp-includes/html-api/class-wp-css-complex-selector.php b/src/wp-includes/html-api/class-wp-css-complex-selector.php
index c6795254ea7b8..4461e4d7d92f3 100644
--- a/src/wp-includes/html-api/class-wp-css-complex-selector.php
+++ b/src/wp-includes/html-api/class-wp-css-complex-selector.php
@@ -4,7 +4,7 @@
  *
  * @package WordPress
  * @subpackage HTML-API
- * @since TBD
+ * @since 6.8.0
  */
 
 /**
@@ -15,7 +15,7 @@
  * A compound selector is at least a single compound selector. There may be additional selectors
  * with combinators.
  *
- * @since TBD
+ * @since 6.8.0
  *
  * @access private
  */
diff --git a/src/wp-includes/html-api/class-wp-css-compound-selector-list.php b/src/wp-includes/html-api/class-wp-css-compound-selector-list.php
index a74ffe0f45fc9..a2ff48e089f5d 100644
--- a/src/wp-includes/html-api/class-wp-css-compound-selector-list.php
+++ b/src/wp-includes/html-api/class-wp-css-compound-selector-list.php
@@ -4,7 +4,7 @@
  *
  * @package WordPress
  * @subpackage HTML-API
- * @since TBD
+ * @since 6.8.0
  */
 
 /**
@@ -67,7 +67,7 @@
  *   - `svg|*` to select all SVG elements
  *   - `html|title` to select only HTML TITLE elements.
  *
- * @since TBD
+ * @since 6.8.0
  *
  * @access private
  *
@@ -116,7 +116,7 @@ protected function __construct( array $selectors ) {
 	 * Takes a CSS selector string and returns an instance of itself or `null` if the selector
 	 * string is invalid or unsupported.
 	 *
-	 * @since TBD
+	 * @since 6.8.0
 	 *
 	 * @param string $input CSS selectors.
 	 * @return static|null
diff --git a/src/wp-includes/html-api/class-wp-css-compound-selector.php b/src/wp-includes/html-api/class-wp-css-compound-selector.php
index 414d36301ec5d..9596876685212 100644
--- a/src/wp-includes/html-api/class-wp-css-compound-selector.php
+++ b/src/wp-includes/html-api/class-wp-css-compound-selector.php
@@ -4,7 +4,7 @@
  *
  * @package WordPress
  * @subpackage HTML-API
- * @since TBD
+ * @since 6.8.0
  */
 
 /**
@@ -17,7 +17,7 @@
  *   - Zero or more subclass selectors (ID, class, or attribute selectors).
  *   - At least one of the above.
  *
- * @since TBD
+ * @since 6.8.0
  *
  * @access private
  */
diff --git a/src/wp-includes/html-api/class-wp-css-id-selector.php b/src/wp-includes/html-api/class-wp-css-id-selector.php
index ca61f00bb7e67..2a600923fa2a2 100644
--- a/src/wp-includes/html-api/class-wp-css-id-selector.php
+++ b/src/wp-includes/html-api/class-wp-css-id-selector.php
@@ -4,7 +4,7 @@
  *
  * @package WordPress
  * @subpackage HTML-API
- * @since TBD
+ * @since 6.8.0
  */
 
 /**
@@ -12,7 +12,7 @@
  *
  * This class is used to test for matching HTML tags in a {@see WP_HTML_Tag_Processor}.
  *
- * @since TBD
+ * @since 6.8.0
  *
  * @access private
  */
diff --git a/src/wp-includes/html-api/class-wp-css-type-selector.php b/src/wp-includes/html-api/class-wp-css-type-selector.php
index 66d6a1f2db48f..3f7671851c375 100644
--- a/src/wp-includes/html-api/class-wp-css-type-selector.php
+++ b/src/wp-includes/html-api/class-wp-css-type-selector.php
@@ -4,7 +4,7 @@
  *
  * @package WordPress
  * @subpackage HTML-API
- * @since TBD
+ * @since 6.8.0
  */
 
 /**
@@ -12,7 +12,7 @@
  *
  * This class is used to test for matching HTML tags in a {@see WP_HTML_Tag_Processor}.
  *
- * @since TBD
+ * @since 6.8.0
  *
  * @access private
  */
diff --git a/src/wp-includes/html-api/class-wp-html-processor.php b/src/wp-includes/html-api/class-wp-html-processor.php
index 7ad65cb9d03d4..6685eaaf79aea 100644
--- a/src/wp-includes/html-api/class-wp-html-processor.php
+++ b/src/wp-includes/html-api/class-wp-html-processor.php
@@ -652,7 +652,7 @@ public function get_unsupported_exception() {
 	 *         );
 	 *     }
 	 *
-	 * @since TBD
+	 * @since 6.8.0
 	 *
 	 * @param string $selector_string Selector string.
 	 * @return Generator<void> A generator pausing on each tag matching the selector.
@@ -692,7 +692,7 @@ public function select_all( $selector_string ): Generator {
 	 *         $processor->get_attribute( 'charset' ), // string(5) "utf-8"
 	 *     );
 	 *
-	 * @since TBD
+	 * @since 6.8.0
 	 *
 	 * @param string $selector_string
 	 * @return bool  True if a matching tag was found, otherwise false.
diff --git a/src/wp-includes/html-api/class-wp-html-tag-processor.php b/src/wp-includes/html-api/class-wp-html-tag-processor.php
index a7633291b6bb2..8ea6e930f5b91 100644
--- a/src/wp-includes/html-api/class-wp-html-tag-processor.php
+++ b/src/wp-includes/html-api/class-wp-html-tag-processor.php
@@ -877,7 +877,7 @@ public function change_parsing_namespace( string $new_namespace ): bool {
 	 *         );
 	 *     }
 	 *
-	 * @since TBD
+	 * @since 6.8.0
 	 *
 	 * @param string $selector_string Selector string.
 	 * @return Generator<void> A generator pausing on each tag matching the selector.
@@ -917,7 +917,7 @@ public function select_all( $selector_string ): Generator {
 	 *         $processor->get_attribute( 'charset' ), // string(5) "utf-8"
 	 *     );
 	 *
-	 * @since TBD
+	 * @since 6.8.0
 	 *
 	 * @param string $selector_string
 	 * @return bool  True if a matching tag was found, otherwise false.
diff --git a/tests/phpunit/tests/html-api/wpCssComplexSelectorList.php b/tests/phpunit/tests/html-api/wpCssComplexSelectorList.php
index 076d5b6f65ee6..829af95a55d5f 100644
--- a/tests/phpunit/tests/html-api/wpCssComplexSelectorList.php
+++ b/tests/phpunit/tests/html-api/wpCssComplexSelectorList.php
@@ -6,7 +6,7 @@
  *
  * @subpackage HTML-API
  *
- * @since TBD
+ * @since 6.8.0
  *
  * @group html-api
  */
diff --git a/tests/phpunit/tests/html-api/wpCssCompoundSelectorList.php b/tests/phpunit/tests/html-api/wpCssCompoundSelectorList.php
index 2c7a4695f679e..c112585e622c8 100644
--- a/tests/phpunit/tests/html-api/wpCssCompoundSelectorList.php
+++ b/tests/phpunit/tests/html-api/wpCssCompoundSelectorList.php
@@ -6,7 +6,7 @@
  *
  * @subpackage HTML-API
  *
- * @since TBD
+ * @since 6.8.0
  *
  * @group html-api
  */
diff --git a/tests/phpunit/tests/html-api/wpHtmlProcessor-select.php b/tests/phpunit/tests/html-api/wpHtmlProcessor-select.php
index 21828faf42e80..a8f6a7c949080 100644
--- a/tests/phpunit/tests/html-api/wpHtmlProcessor-select.php
+++ b/tests/phpunit/tests/html-api/wpHtmlProcessor-select.php
@@ -8,7 +8,7 @@
  * @package WordPress
  * @subpackage HTML-API
  *
- * @since TBD
+ * @since 6.8.0
  *
  * @group html-api
  */
diff --git a/tests/phpunit/tests/html-api/wpHtmlTagProcessor-select.php b/tests/phpunit/tests/html-api/wpHtmlTagProcessor-select.php
index 586e38b4bafb2..28f88778629ce 100644
--- a/tests/phpunit/tests/html-api/wpHtmlTagProcessor-select.php
+++ b/tests/phpunit/tests/html-api/wpHtmlTagProcessor-select.php
@@ -8,7 +8,7 @@
  * @package WordPress
  * @subpackage HTML-API
  *
- * @since TBD
+ * @since 6.8.0
  *
  * @group html-api
  */