diff --git a/.gitignore b/.gitignore
index f20f79a..214daf8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -212,3 +212,5 @@ noarch/
 /tzdata2023d.tar.gz
 /tzcode2024a.tar.gz
 /tzdata2024a.tar.gz
+/tzcode2024b.tar.gz
+/tzdata2024b.tar.gz
diff --git a/0004-Fix-Apr-vs-April-2024b.patch b/0004-Fix-Apr-vs-April-2024b.patch
new file mode 100644
index 0000000..7c3d161
--- /dev/null
+++ b/0004-Fix-Apr-vs-April-2024b.patch
@@ -0,0 +1,23 @@
+commit 926b507fa5c3192b1b68fab5910cbd3ba9377c97
+Author: Paul Eggert <eggert@cs.ucla.edu>
+Date:   Thu Sep 5 14:36:02 2024 -0700
+
+    "Apr", not "April", in IN column
+    
+    * northamerica (Rule): Use "Apr", not "April", in the IN column.
+    Both forms are valid, but "Apr" is more consistent.
+    Problem reported by Howard Hinnant.
+
+diff --git a/northamerica b/northamerica
+index 01f392e0..1af874b6 100644
+--- a/northamerica
++++ b/northamerica
+@@ -2631,7 +2631,7 @@ Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
+ # http://puentelibre.mx/noticia/ciudad_juarez_cambio_horario_noviembre_2022/
+ 
+ # Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
+-Rule	Mexico	1931	only	-	April	30	0:00	1:00	D
++Rule	Mexico	1931	only	-	Apr	30	0:00	1:00	D
+ Rule	Mexico	1931	only	-	Oct	1	0:00	0	S
+ Rule	Mexico	1939	only	-	Feb	5	0:00	1:00	D
+ Rule	Mexico	1939	only	-	Jun	25	0:00	0	S
diff --git a/0005-Improve-style-checks-for-months-2024b.patch b/0005-Improve-style-checks-for-months-2024b.patch
new file mode 100644
index 0000000..b02b882
--- /dev/null
+++ b/0005-Improve-style-checks-for-months-2024b.patch
@@ -0,0 +1,77 @@
+commit 7b6fb155cadd5e5ee70b55c2770e1bdd2f5d2a38
+Author: Paul Eggert <eggert@cs.ucla.edu>
+Date:   Thu Sep 5 14:38:35 2024 -0700
+
+    Improve style checks for months
+    
+    * checktab.awk: Check style of STDOFF and month names.
+
+diff --git a/checktab.awk b/checktab.awk
+index 9a26e465..15a3a697 100644
+--- a/checktab.awk
++++ b/checktab.awk
+@@ -9,6 +9,19 @@ BEGIN {
+ 	if (!zone_table) zone_table = "zone1970.tab"
+ 	if (!want_warnings) want_warnings = -1
+ 
++	monthabbr["Jan"] = 1
++	monthabbr["Feb"] = 1
++	monthabbr["Mar"] = 1
++	monthabbr["Apr"] = 1
++	monthabbr["May"] = 1
++	monthabbr["Jun"] = 1
++	monthabbr["Jul"] = 1
++	monthabbr["Aug"] = 1
++	monthabbr["Sep"] = 1
++	monthabbr["Oct"] = 1
++	monthabbr["Nov"] = 1
++	monthabbr["Dec"] = 1
++
+ 	while (getline <iso_table) {
+ 		iso_NR++
+ 		if ($0 ~ /^#/) continue
+@@ -128,12 +141,14 @@ BEGIN {
+ $1 ~ /^#/ { next }
+ 
+ {
+-	tz = rules = ""
++	tz = rules = stdoff = ""
+ 	if ($1 == "Zone") {
+ 		tz = $2
++		stdoff = $3
+ 		ruleUsed[$4] = 1
+ 		if ($5 ~ /%/) rulePercentUsed[$4] = 1
+-	} else if ($1 == "Link" && zone_table == "zone.tab") {
++	} else if ($1 == "Link") {
++	    if (zone_table == "zone.tab") {
+ 		# Ignore Link commands if source and destination basenames
+ 		# are identical, e.g. Europe/Istanbul versus Asia/Istanbul.
+ 		src = $2
+@@ -141,13 +156,27 @@ $1 ~ /^#/ { next }
+ 		while ((i = index(src, "/"))) src = substr(src, i+1)
+ 		while ((i = index(dst, "/"))) dst = substr(dst, i+1)
+ 		if (src != dst) tz = $3
++	    }
+ 	} else if ($1 == "Rule") {
+ 		ruleDefined[$2] = 1
+ 		if ($10 != "-") ruleLetters[$2] = 1
++		if (!monthabbr[$6]) {
++		  printf "%s:%d: tricky month: %s\n", FILENAME, FNR, $6 \
++			  >>"/dev/stderr"
++		  status = 1
++		}
+ 	} else {
++		stdoff = $1
+ 		ruleUsed[$2] = 1
+ 		if ($3 ~ /%/) rulePercentUsed[$2] = 1
+ 	}
++
++	if (stdoff && stdoff !~ /^\-?1?[0-9](:[0-5][0-9](:[0-5][0-9])?)?$/) {
++		printf "%s:%d: unlikely STDOFF: %s\n", FILENAME, FNR, stdoff \
++			>>"/dev/stderr"
++		status = 1
++	}
++
+ 	if (tz && tz ~ /\// && tz !~ /^Etc\//) {
+ 		if (!tztab[tz] && FILENAME != "backward" \
+ 		    && zone_table != "zonenow.tab") {
diff --git a/sources b/sources
index 2fb4af3..85f3e43 100644
--- a/sources
+++ b/sources
@@ -1,4 +1,4 @@
 SHA512 (javazic.tar.gz) = c23a4a437a87d0792f23e98025520a11273fc3d12ef5dcf64af8332ed60ba9ce77eaadfd234cee92b3ca9dc08b9e4123e804745925d68ddbd0b2e1e9039e526b
 SHA512 (javazic-1.8-37392f2f5d59.tar.xz) = 2ba718dfeed53a3bd6b44e3dfe96338a609e482e4e6d942e2a7e622fc6c52606cb323ac3a59739c463e34f70fff217c0a61f5b3d3c4958eff2801b1504ee4204
-SHA512 (tzcode2024a.tar.gz) = 46da8bfa762c7d109db93e5c060789097fc0e1e38bdad5bb8fec886ef47f138bd03b913a743cd5f7e23dc359a72bfd63e7ffc0de199d2b51e6a174361dbdc43c
-SHA512 (tzdata2024a.tar.gz) = 1f09f1b2327cc9e1afc7e9045e83ee3377918dafe1bee2f282b6991828d03b3c70a4d3a17f9207dfb1361bb25bc214a8922a756e84fa114e9ba476226db57236
+SHA512 (tzcode2024b.tar.gz) = 0e4e872d6c6d9e2ce8c4e567fcbb7658942b8544157d1e48673d9cb989f3af3379fa58e7a71ab98f4a8f2ac6727de1f8c4cd1981053409ebd8989345dc640026
+SHA512 (tzdata2024b.tar.gz) = 0d86686e215672343debb3471b7e7ccb8a27f063f085c9b532d5e0470377843daa0dfb6aee0db4fb9068dd52810c69aeee914a1a7c7e603fdecda7e855020193
diff --git a/tzdata.spec b/tzdata.spec
index 4161100..eca0a3b 100644
--- a/tzdata.spec
+++ b/tzdata.spec
@@ -1,9 +1,9 @@
 Summary: Timezone data
 Name: tzdata
-Version: 2024a
-%define tzdata_version 2024a
-%define tzcode_version 2024a
-Release: 2%{?dist}
+Version: 2024b
+%define tzdata_version 2024b
+%define tzcode_version 2024b
+Release: 1%{?dist}
 License: Public Domain
 URL: https://www.iana.org/time-zones
 Source0: ftp://ftp.iana.org/tz/releases/tzdata%{tzdata_version}.tar.gz
@@ -13,6 +13,8 @@ Patch002: 0002-Fix-have-snprintf.patch
 %if 0%{?rhel} || 0%{?eln}
 Patch003: 0003-continue-to-ship-posixrules.patch
 %endif
+Patch004: 0004-Fix-Apr-vs-April-2024b.patch
+Patch005: 0005-Improve-style-checks-for-months-2024b.patch
 
 BuildRequires: make
 BuildRequires: gawk, glibc, perl-interpreter
@@ -46,6 +48,8 @@ This package contains timezone information for use by Java runtimes.
 %if 0%{?rhel} || 0%{?eln}
 %patch003 -p1
 %endif
+%patch004 -p1
+%patch005 -p1
 
 # tzdata-2018g introduced 25:00 transition times.  This breaks OpenJDK.
 # Use rearguard for java
@@ -153,6 +157,17 @@ install -p -m 644 tzdb.dat $RPM_BUILD_ROOT%{_datadir}/javazi-1.8/
 %{_datadir}/javazi-1.8
 
 %changelog
+* Wed Sep 11 2024 Patsy Griffin <patsy@redhat.com> - 2024b-1
+- Update to tzdata-2024b
+  - Improve historical data for Mexico, Mongolia, and Portugal.
+  - System V names are now obsolescent.
+  - The main data form now uses %z.
+  - The code now conforms to RFC 8536 for early timestamps.
+  - Support POSIX.1-2024, which removes asctime_r and ctime_r.
+  - Assume POSIX.2-1992 or later for shell scripts.
+  - SUPPORT_C89 now defaults to 1.
+  - Include two upstream patches for month names as in April vs Apr.
+
 * Thu Mar 14 2024 Patsy Griffin <patsy@redhat.com> - 2024a-2
 - Add java patch to fix incorrect calculations for
   Africa/Casablanca starting in 2027. (RHEL-26860)