diff --git a/NEWS b/NEWS
index c141fbb026b..a39543a1d45 100644
--- a/NEWS
+++ b/NEWS
@@ -59,6 +59,11 @@ PHP                                                                        NEWS
   . Added NumberFormatter::ROUND_TOWARD_ZERO and ::ROUND_AWAY_FROM_ZERO as
     aliases for ::ROUND_DOWN and ::ROUND_UP. (Jorg Sowa)
   . Added NumberFormatter::ROUND_HALFODD. (Ayesh Karunaratne)
+  . Added UCHAR_IDS_UNARY_OPERATOR, UCHAR_ID_COMPAT_MATH_START and
+    UCHAR_ID_COMPAT_MATH_CONTINUE constants. (David Carlier)
+  . Added IntlDateFormatter::getIanaID/intltz_get_iana_id method/function.
+    (David Carlier)
+  . Set to C++17 standard for icu 74 and onwards.
 
 - LDAP:
   . Added LDAP_OPT_X_TLS_PROTOCOL_MAX/LDAP_OPT_X_TLS_PROTOCOL_TLS1_3
diff --git a/UPGRADING b/UPGRADING
index 036a4a9a75e..9e6a8359d03 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -391,6 +391,10 @@ PHP 8.4 UPGRADE NOTES
   . Added DOMXPath::registerPhpFunctionNS().
     RFC: https://wiki.php.net/rfc/improve_callbacks_dom_and_xsl
 
+- Intl:
+  . Added IntlDateFormatter::getIanaID()/intltz_get_iana_id() to
+    the IANA identifier from a given timezone.
+
 - MBString:
   . Added mb_trim, mb_ltrim and mb_rtrim functions.
     RFC: https://wiki.php.net/rfc/mb_trim
@@ -462,6 +466,10 @@ PHP 8.4 UPGRADE NOTES
 - Intl:
   . The IntlDateFormatter class exposes now the new PATTERN constant
     reflecting udat api's UDAT_PATTERN.
+  . The IntlChar class exposes now the new PROPERTY_IDS_UNARY_OPERATOR (new
+    IDS binary operator), PROPERTY_ID_COMPT_MATH_START,
+    PROPERTY_ID_COMPT_MATH_CONTINUE (both for mathematical
+    identifier profiling purpose) constants.
 
 - LDAP:
   . LDAP_OPT_X_TLS_PROTOCOL_MAX.