diff -Nru libdatetime-timezone-perl-2.47/debian/changelog libdatetime-timezone-perl-2.47/debian/changelog
--- libdatetime-timezone-perl-2.47/debian/changelog	2022-11-30 18:14:07.000000000 +0100
+++ libdatetime-timezone-perl-2.47/debian/changelog	2023-03-24 16:58:22.000000000 +0100
@@ -1,3 +1,11 @@
+libdatetime-timezone-perl (1:2.47-1+2023b) bullseye; urgency=medium
+
+  * Update data to Olson database version 2023b.
+    This update contains contemporary changes for Egypt, Greenland, Morocco,
+    and Palestine (2023a), and for Lebanon (2023b).
+
+ -- gregor herrmann <gregoa@debian.org>  Fri, 24 Mar 2023 16:58:22 +0100
+
 libdatetime-timezone-perl (1:2.47-1+2022g) bullseye; urgency=medium
 
   * Update data to Olson database version 2022g.
diff -Nru libdatetime-timezone-perl-2.47/debian/patches/olson-2023b libdatetime-timezone-perl-2.47/debian/patches/olson-2023b
--- libdatetime-timezone-perl-2.47/debian/patches/olson-2023b	1970-01-01 01:00:00.000000000 +0100
+++ libdatetime-timezone-perl-2.47/debian/patches/olson-2023b	2023-03-24 16:58:22.000000000 +0100
@@ -0,0 +1,16906 @@
+Description: Update to Olson DB 2023b
+Origin: vendor
+Author: gregor herrmann <gregoa@debian.org>
+Last-Update: 2023-03-24
+
+--- a/lib/DateTime/TimeZone/Africa/Abidjan.pm
++++ b/lib/DateTime/TimeZone/Africa/Abidjan.pm
+@@ -3,7 +3,7 @@
+ # DateTime::TimeZone module distribution in the tools/ directory
+ 
+ #
+-# Generated from debian/tzdata/africa.  Olson data version 2022g
++# Generated from debian/tzdata/africa.  Olson data version 2023b
+ #
+ # Do not edit this file directly.
+ #
+@@ -43,11 +43,11 @@
+     ],
+ ];
+ 
+-sub olson_version {'2022g'}
++sub olson_version {'2023b'}
+ 
+ sub has_dst_changes {0}
+ 
+-sub _max_year {2032}
++sub _max_year {2033}
+ 
+ sub _new_instance {
+     return shift->_init( @_, spans => $spans );
+--- a/lib/DateTime/TimeZone/Asia/Beirut.pm
++++ b/lib/DateTime/TimeZone/Asia/Beirut.pm
+@@ -3,7 +3,7 @@
+ # DateTime::TimeZone module distribution in the tools/ directory
+ 
+ #
+-# Generated from debian/tzdata/asia.  Olson data version 2022g
++# Generated from debian/tzdata/asia.  Olson data version 2023b
+ #
+ # Do not edit this file directly.
+ #
+@@ -1024,17 +1024,17 @@
+     ],
+     [
+ 63802760400, #    utc_start 2022-10-29 21:00:00 (Sat)
+-63815464800, #      utc_end 2023-03-25 22:00:00 (Sat)
++63817711200, #      utc_end 2023-04-20 22:00:00 (Thu)
+ 63802767600, #  local_start 2022-10-29 23:00:00 (Sat)
+-63815472000, #    local_end 2023-03-26 00:00:00 (Sun)
++63817718400, #    local_end 2023-04-21 00:00:00 (Fri)
+ 7200,
+ 0,
+ 'EET',
+     ],
+     [
+-63815464800, #    utc_start 2023-03-25 22:00:00 (Sat)
++63817711200, #    utc_start 2023-04-20 22:00:00 (Thu)
+ 63834210000, #      utc_end 2023-10-28 21:00:00 (Sat)
+-63815475600, #  local_start 2023-03-26 01:00:00 (Sun)
++63817722000, #  local_start 2023-04-21 01:00:00 (Fri)
+ 63834220800, #    local_end 2023-10-29 00:00:00 (Sun)
+ 10800,
+ 1,
+@@ -1220,13 +1220,31 @@
+ 1,
+ 'EEST',
+     ],
++    [
++64149915600, #    utc_start 2033-10-29 21:00:00 (Sat)
++64162620000, #      utc_end 2034-03-25 22:00:00 (Sat)
++64149922800, #  local_start 2033-10-29 23:00:00 (Sat)
++64162627200, #    local_end 2034-03-26 00:00:00 (Sun)
++7200,
++0,
++'EET',
++    ],
++    [
++64162620000, #    utc_start 2034-03-25 22:00:00 (Sat)
++64181365200, #      utc_end 2034-10-28 21:00:00 (Sat)
++64162630800, #  local_start 2034-03-26 01:00:00 (Sun)
++64181376000, #    local_end 2034-10-29 00:00:00 (Sun)
++10800,
++1,
++'EEST',
++    ],
+ ];
+ 
+-sub olson_version {'2022g'}
++sub olson_version {'2023b'}
+ 
+-sub has_dst_changes {66}
++sub has_dst_changes {67}
+ 
+-sub _max_year {2032}
++sub _max_year {2033}
+ 
+ sub _new_instance {
+     return shift->_init( @_, spans => $spans );
+@@ -1275,24 +1293,24 @@
+ my $rules = [
+   bless( {
+     'at' => '0:00',
+-    'from' => '1993',
+-    'in' => 'Mar',
+-    'letter' => 'S',
++    'from' => '1999',
++    'in' => 'Oct',
++    'letter' => '',
+     'name' => 'Lebanon',
+-    'offset_from_std' => 3600,
++    'offset_from_std' => 0,
+     'on' => 'lastSun',
+-    'save' => '1:00',
++    'save' => '0',
+     'to' => 'max'
+   }, 'DateTime::TimeZone::OlsonDB::Rule' ),
+   bless( {
+     'at' => '0:00',
+-    'from' => '1999',
+-    'in' => 'Oct',
+-    'letter' => '',
++    'from' => '2024',
++    'in' => 'Mar',
++    'letter' => 'S',
+     'name' => 'Lebanon',
+-    'offset_from_std' => 0,
++    'offset_from_std' => 3600,
+     'on' => 'lastSun',
+-    'save' => '0',
++    'save' => '1:00',
+     'to' => 'max'
+   }, 'DateTime::TimeZone::OlsonDB::Rule' )
+ ]
diff -Nru libdatetime-timezone-perl-2.47/debian/patches/series libdatetime-timezone-perl-2.47/debian/patches/series
--- libdatetime-timezone-perl-2.47/debian/patches/series	2022-11-30 18:14:07.000000000 +0100
+++ libdatetime-timezone-perl-2.47/debian/patches/series	2023-03-24 16:58:22.000000000 +0100
@@ -7,3 +7,4 @@
 olson-2022e
 olson-2022f
 olson-2022g
+olson-2023b