diff --git a/ext/intl/php_intl.c b/ext/intl/php_intl.c
index 95045551cef..bc67443c54b 100755
--- a/ext/intl/php_intl.c
+++ b/ext/intl/php_intl.c
@@ -718,6 +718,9 @@ zend_function_entry intl_functions[] = {
 	PHP_FE( intltz_create_default, arginfo_tz_void )
 	PHP_FE( intltz_get_id, arginfo_tz_only_tz )
 	PHP_FE( intltz_get_gmt, arginfo_tz_void )
+#if U_ICU_VERSION_MAJOR_NUM >= 49
+	PHP_FE( intltz_get_unknown, arginfo_tz_void )
+#endif
 	PHP_FE( intltz_create_enumeration, arginfo_tz_create_enumeration )
 	PHP_FE( intltz_count_equivalent_ids, arginfo_tz_idarg_static )
 	PHP_FE( intltz_create_time_zone_id_enumeration, arginfo_tz_create_time_zone_id_enumeration )
diff --git a/ext/intl/tests/timezone_getUnknown_basic.phpt b/ext/intl/tests/timezone_getUnknown_basic.phpt
new file mode 100644
index 00000000000..aef1a54561c
--- /dev/null
+++ b/ext/intl/tests/timezone_getUnknown_basic.phpt
@@ -0,0 +1,35 @@
+--TEST--
+IntlCalendar::getUnknown(): basic test
+--SKIPIF--
+<?php
+if (!extension_loaded('intl'))
+	die('skip intl extension not enabled');
+if (version_compare(INTL_ICU_VERSION, '49') < 0)
+	die('skip for ICU 49+');
+--FILE--
+<?php
+ini_set("intl.error_level", E_WARNING);
+ini_set("intl.default_locale", "nl");
+
+$tz = IntlTimeZone::getUnknown();
+print_r($tz);
+$tz = intltz_get_unknown();
+print_r($tz);
+?>
+==DONE==
+--EXPECT--
+IntlTimeZone Object
+(
+    [valid] => 1
+    [id] => Etc/Unknown
+    [rawOffset] => 0
+    [currentOffset] => 0
+)
+IntlTimeZone Object
+(
+    [valid] => 1
+    [id] => Etc/Unknown
+    [rawOffset] => 0
+    [currentOffset] => 0
+)
+==DONE==
\ No newline at end of file
diff --git a/ext/intl/tests/timezone_getUnknown_error.phpt b/ext/intl/tests/timezone_getUnknown_error.phpt
new file mode 100644
index 00000000000..4aec28f8067
--- /dev/null
+++ b/ext/intl/tests/timezone_getUnknown_error.phpt
@@ -0,0 +1,27 @@
+--TEST--
+IntlCalendar::getUnknown(): bad arguments
+--SKIPIF--
+<?php
+if (!extension_loaded('intl'))
+	die('skip intl extension not enabled');
+if (version_compare(INTL_ICU_VERSION, '49') < 0)
+	die('skip for ICU 49+');
+--FILE--
+<?php
+ini_set("intl.error_level", E_WARNING);
+
+$c = new IntlGregorianCalendar(NULL, 'pt_PT');
+
+IntlTimeZone::getUnknown(1);
+
+intltz_get_unknown(1);
+
+--EXPECTF--
+
+Warning: IntlTimeZone::getUnknown() expects exactly 0 parameters, 1 given in %s on line %d
+
+Warning: IntlTimeZone::getUnknown(): intltz_get_unknown: bad arguments in %s on line %d
+
+Warning: intltz_get_unknown() expects exactly 0 parameters, 1 given in %s on line %d
+
+Warning: intltz_get_unknown(): intltz_get_unknown: bad arguments in %s on line %d
diff --git a/ext/intl/timezone/timezone_class.cpp b/ext/intl/timezone/timezone_class.cpp
index 5b8dfd21997..dcd62929ca0 100644
--- a/ext/intl/timezone/timezone_class.cpp
+++ b/ext/intl/timezone/timezone_class.cpp
@@ -371,6 +371,9 @@ static zend_function_entry TimeZone_class_functions[] = {
 	PHP_ME_MAPPING(createTimeZone,		intltz_create_time_zone,		ainfo_tz_idarg,				ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
 	PHP_ME_MAPPING(createDefault,		intltz_create_default,			ainfo_tz_void,				ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
 	PHP_ME_MAPPING(getGMT,				intltz_get_gmt,					ainfo_tz_void,				ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
+#if U_ICU_VERSION_MAJOR_NUM >= 49
+	PHP_ME_MAPPING(getUnknown,			intltz_get_unknown,				ainfo_tz_void,				ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
+#endif
 	PHP_ME_MAPPING(createEnumeration,	intltz_create_enumeration,		ainfo_tz_createEnumeration,	ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
 	PHP_ME_MAPPING(countEquivalentIDs,	intltz_count_equivalent_ids,	ainfo_tz_idarg,				ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
 	PHP_ME_MAPPING(createTimeZoneIDEnumeration, intltz_create_time_zone_id_enumeration, ainfo_tz_createTimeZoneIDEnumeration, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
diff --git a/ext/intl/timezone/timezone_methods.cpp b/ext/intl/timezone/timezone_methods.cpp
index a6de82de24c..37b39967069 100644
--- a/ext/intl/timezone/timezone_methods.cpp
+++ b/ext/intl/timezone/timezone_methods.cpp
@@ -84,6 +84,20 @@ U_CFUNC PHP_FUNCTION(intltz_get_gmt)
 	timezone_object_construct(TimeZone::getGMT(), return_value, 0 TSRMLS_CC);
 }
 
+#if U_ICU_VERSION_MAJOR_NUM >= 49
+U_CFUNC PHP_FUNCTION(intltz_get_unknown)
+{
+	intl_error_reset(NULL TSRMLS_CC);
+
+	if (zend_parse_parameters_none() == FAILURE) {
+		intl_error_set(NULL, U_ILLEGAL_ARGUMENT_ERROR,
+			"intltz_get_unknown: bad arguments", 0 TSRMLS_CC);
+		RETURN_NULL();
+	}
+
+	timezone_object_construct(&TimeZone::getUnknown(), return_value, 0 TSRMLS_CC);
+}
+#endif
 
 U_CFUNC PHP_FUNCTION(intltz_create_enumeration)
 {
diff --git a/ext/intl/timezone/timezone_methods.h b/ext/intl/timezone/timezone_methods.h
index b16881209b7..207caa3cb06 100644
--- a/ext/intl/timezone/timezone_methods.h
+++ b/ext/intl/timezone/timezone_methods.h
@@ -27,6 +27,8 @@ PHP_FUNCTION(intltz_get_id);
 
 PHP_FUNCTION(intltz_get_gmt);
 
+PHP_FUNCTION(intltz_get_unknown);
+
 PHP_FUNCTION(intltz_create_enumeration);
 
 PHP_FUNCTION(intltz_count_equivalent_ids);