diff --git a/.gitignore b/.gitignore
index 7b44be9..e5accb1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
 SOURCES/javazic.tar.gz
-SOURCES/tzcode2015a.tar.gz
-SOURCES/tzdata2015a.tar.gz
+SOURCES/tzcode2015b.tar.gz
+SOURCES/tzdata2015b.tar.gz
diff --git a/.tzdata.metadata b/.tzdata.metadata
index 3f094f8..8832dc9 100644
--- a/.tzdata.metadata
+++ b/.tzdata.metadata
@@ -1,3 +1,3 @@
 ee8ad215161cd132e65e2be447b279457158b540 SOURCES/javazic.tar.gz
-22541acf7ffed47b7ee67959c112b6f23b1afefb SOURCES/tzcode2015a.tar.gz
-b08b129f32ad9f5d260c8f519dbcafeb33118e34 SOURCES/tzdata2015a.tar.gz
+b080e6effce55c2a4a7153d9ea3716f69d34d379 SOURCES/tzcode2015b.tar.gz
+1efd383ad6b43eeee95f603e3a6ea6ff4bd55b81 SOURCES/tzdata2015b.tar.gz
diff --git a/SPECS/tzdata.spec b/SPECS/tzdata.spec
index 6a801e2..e371226 100644
--- a/SPECS/tzdata.spec
+++ b/SPECS/tzdata.spec
@@ -1,8 +1,8 @@
 Summary: Timezone data
 Name: tzdata
-Version: 2015a
-%define tzdata_version 2015a
-%define tzcode_version 2015a
+Version: 2015b
+%define tzdata_version 2015b
+%define tzcode_version 2015b
 Release: 1%{?dist}
 License: Public Domain
 Group: System Environment/Base
@@ -96,14 +96,22 @@ rm -rf $RPM_BUILD_ROOT
 %{_datadir}/javazi
 
 %changelog
+* Sat Mar 21 2015 Patsy Franklin <pfrankli@redhat.com> - 2015b-1
+- Rebase to 2015b
+  - Mongolia will start observing DST again this year, from the last
+    Saturday in March at 02:00 to the last Saturday in September at 00:00.
+  - Palestine will start DST on March 28, not March 27.  Also,
+    correct the fall 2014 transition from September 26 to October 24.
+    Adjust future predictions accordingly.
+
 * Fri Jan 30 2015 Patsy Franklin <pfrankli@redhat.com> - 2015a-1
 - Rebase to 2015a
   - New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49.
   - The Mexican state of Quintana Roo, represented by America/Cancun,
     will shift from Central Time with DST to Eastern Time without DST
     on 2015-02-01 at 02:00.
-  - Chile will not change clocks in April or thereafter; its new 
-    standard time will be its old daylight saving time.  This affects 
+  - Chile will not change clocks in April or thereafter; its new
+    standard time will be its old daylight saving time.  This affects
     America/Santiago, Pacific/Easter, and Antarctica/Palmer.
 
 * Tue Nov 11 2014 Patsy Franklin <pfrankli@redhat.com> - 2014j-1