diff --git a/.gitignore b/.gitignore
index 87649e4..7ad4453 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
 SOURCES/javazic-1.8-37392f2f5d59.tar.xz
 SOURCES/javazic.tar.gz
-SOURCES/tzcode2017c.tar.gz
-SOURCES/tzdata2017c.tar.gz
+SOURCES/tzcode2018c.tar.gz
+SOURCES/tzdata2018c.tar.gz
diff --git a/.tzdata.metadata b/.tzdata.metadata
index 33b4220..4777b80 100644
--- a/.tzdata.metadata
+++ b/.tzdata.metadata
@@ -1,4 +1,4 @@
 77292e1839952807567570118e01405b405af80c SOURCES/javazic-1.8-37392f2f5d59.tar.xz
 ee8ad215161cd132e65e2be447b279457158b540 SOURCES/javazic.tar.gz
-c7210df05dbb23b4e3aed699f258acfe45146947 SOURCES/tzcode2017c.tar.gz
-d7b686e550b824f6f832332efa65594e2f570954 SOURCES/tzdata2017c.tar.gz
+4db9b2d9fd9462e5f419ac8ad301729bece0fc85 SOURCES/tzcode2018c.tar.gz
+ed84663439056a9ef1b3a5cdd7715ad5b2e3c568 SOURCES/tzdata2018c.tar.gz
diff --git a/SOURCES/0001-Fix-Makefile-quoting-bug.patch b/SOURCES/0001-Fix-Makefile-quoting-bug.patch
deleted file mode 100644
index 41e04fd..0000000
--- a/SOURCES/0001-Fix-Makefile-quoting-bug.patch
+++ /dev/null
@@ -1,170 +0,0 @@
-From b520d20b8122a783f99f088758b78d928f70ee34 Mon Sep 17 00:00:00 2001
-From: Paul Eggert <eggert@cs.ucla.edu>
-Date: Mon, 23 Oct 2017 11:42:45 -0700
-Subject: [PROPOSED] Fix Makefile quoting bug
-
-Problem with INSTALLARGS reported by Zefram in:
-https://mm.icann.org/pipermail/tz/2017-October/025360.html
-Fix similar problems too.
-* Makefile (ZIC_INSTALL, VALIDATE_ENV, CC, install)
-(INSTALL, version, INSTALLARGS, right_posix, posix_right)
-(check_public): Use apostrophes to prevent undesirable
-interpretation of names by the shell.  We still do not support
-directory names containing apostrophes or newlines, but this is
-good enough.
-* NEWS: Mention this.
----
- Makefile | 64 ++++++++++++++++++++++++++++++++--------------------------------
- NEWS     |  8 ++++++++
- 2 files changed, 40 insertions(+), 32 deletions(-)
-
-diff --git a/Makefile b/Makefile
-index c92edc0..97649ca 100644
---- a/Makefile
-+++ b/Makefile
-@@ -313,7 +313,7 @@ ZFLAGS=
- 
- # How to use zic to install tz binary files.
- 
--ZIC_INSTALL=	$(ZIC) -d $(DESTDIR)$(TZDIR) $(LEAPSECONDS)
-+ZIC_INSTALL=	$(ZIC) -d '$(DESTDIR)$(TZDIR)' $(LEAPSECONDS)
- 
- # The name of a Posix-compliant 'awk' on your system.
- AWK=		awk
-@@ -341,8 +341,8 @@ SGML_CATALOG_FILES= \
- VALIDATE = nsgmls
- VALIDATE_FLAGS = -s -B -wall -wno-unused-param
- VALIDATE_ENV = \
--  SGML_CATALOG_FILES=$(SGML_CATALOG_FILES) \
--  SGML_SEARCH_PATH=$(SGML_SEARCH_PATH) \
-+  SGML_CATALOG_FILES='$(SGML_CATALOG_FILES)' \
-+  SGML_SEARCH_PATH='$(SGML_SEARCH_PATH)' \
-   SP_CHARSET_FIXED=YES \
-   SP_ENCODING=UTF-8
- 
-@@ -396,7 +396,7 @@ GZIPFLAGS=	-9n
- #MAKE=		make
- 
- cc=		cc
--CC=		$(cc) -DTZDIR=\"$(TZDIR)\"
-+CC=		$(cc) -DTZDIR='"$(TZDIR)"'
- 
- AR=		ar
- 
-@@ -473,29 +473,29 @@ all:		tzselect yearistype zic zdump libtz.a $(TABDATA)
- ALL:		all date $(ENCHILADA)
- 
- install:	all $(DATA) $(REDO) $(MANS)
--		mkdir -p $(DESTDIR)$(ETCDIR) $(DESTDIR)$(TZDIR) \
--			$(DESTDIR)$(LIBDIR) \
--			$(DESTDIR)$(MANDIR)/man3 $(DESTDIR)$(MANDIR)/man5 \
--			$(DESTDIR)$(MANDIR)/man8
-+		mkdir -p '$(DESTDIR)$(ETCDIR)' '$(DESTDIR)$(TZDIR)' \
-+			'$(DESTDIR)$(LIBDIR)' \
-+			'$(DESTDIR)$(MANDIR)/man3' '$(DESTDIR)$(MANDIR)/man5' \
-+			'$(DESTDIR)$(MANDIR)/man8'
- 		$(ZIC_INSTALL) -l $(LOCALTIME) -p $(POSIXRULES)
--		cp -f $(TABDATA) $(DESTDIR)$(TZDIR)/.
--		cp tzselect zic zdump $(DESTDIR)$(ETCDIR)/.
--		cp libtz.a $(DESTDIR)$(LIBDIR)/.
--		$(RANLIB) $(DESTDIR)$(LIBDIR)/libtz.a
--		cp -f newctime.3 newtzset.3 $(DESTDIR)$(MANDIR)/man3/.
--		cp -f tzfile.5 $(DESTDIR)$(MANDIR)/man5/.
--		cp -f tzselect.8 zdump.8 zic.8 $(DESTDIR)$(MANDIR)/man8/.
-+		cp -f $(TABDATA) '$(DESTDIR)$(TZDIR)/.'
-+		cp tzselect zic zdump '$(DESTDIR)$(ETCDIR)/.'
-+		cp libtz.a '$(DESTDIR)$(LIBDIR)/.'
-+		$(RANLIB) '$(DESTDIR)$(LIBDIR)/libtz.a'
-+		cp -f newctime.3 newtzset.3 '$(DESTDIR)$(MANDIR)/man3/.'
-+		cp -f tzfile.5 '$(DESTDIR)$(MANDIR)/man5/.'
-+		cp -f tzselect.8 zdump.8 zic.8 '$(DESTDIR)$(MANDIR)/man8/.'
- 
- INSTALL:	ALL install date.1
--		mkdir -p $(DESTDIR)$(BINDIR) $(DESTDIR)$(MANDIR)/man1
--		cp date $(DESTDIR)$(BINDIR)/.
--		cp -f date.1 $(DESTDIR)$(MANDIR)/man1/.
-+		mkdir -p '$(DESTDIR)$(BINDIR)' '$(DESTDIR)$(MANDIR)/man1'
-+		cp date '$(DESTDIR)$(BINDIR)/.'
-+		cp -f date.1 '$(DESTDIR)$(MANDIR)/man1/.'
- 
- version:	$(VERSION_DEPS)
- 		{ (type git) >/dev/null 2>&1 && \
- 		  V=`git describe --match '[0-9][0-9][0-9][0-9][a-z]*' \
- 				--abbrev=7 --dirty` || \
--		  V=$(VERSION); } && \
-+		  V='$(VERSION)'; } && \
- 		printf '%s\n' "$$V" >$@.out
- 		mv $@.out $@
- 
-@@ -529,12 +529,12 @@ leapseconds:	$(LEAP_DEPS)
- # Arguments to pass to submakes of install_data.
- # They can be overridden by later submake arguments.
- INSTALLARGS = \
-- BACKWARD=$(BACKWARD) \
-- DESTDIR=$(DESTDIR) \
-+ BACKWARD='$(BACKWARD)' \
-+ DESTDIR='$(DESTDIR)' \
-  LEAPSECONDS='$(LEAPSECONDS)' \
-  PACKRATDATA='$(PACKRATDATA)' \
-- TZDIR=$(TZDIR) \
-- YEARISTYPE=$(YEARISTYPE) \
-+ TZDIR='$(TZDIR)' \
-+ YEARISTYPE='$(YEARISTYPE)' \
-  ZIC='$(ZIC)'
- 
- # 'make install_data' installs one set of tz binary files.
-@@ -558,16 +558,16 @@ right_only:
- # You must replace all of $(TZDIR) to switch from not using leap seconds
- # to using them, or vice versa.
- right_posix:	right_only
--		rm -fr $(DESTDIR)$(TZDIR)-leaps
--		ln -s $(TZDIR_BASENAME) $(DESTDIR)$(TZDIR)-leaps || \
--		  $(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-leaps right_only
--		$(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-posix posix_only
-+		rm -fr '$(DESTDIR)$(TZDIR)-leaps'
-+		ln -s '$(TZDIR_BASENAME)' '$(DESTDIR)$(TZDIR)-leaps' || \
-+		  $(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-leaps' right_only
-+		$(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-posix' posix_only
- 
- posix_right:	posix_only
--		rm -fr $(DESTDIR)$(TZDIR)-posix
--		ln -s $(TZDIR_BASENAME) $(DESTDIR)$(TZDIR)-posix || \
--		  $(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-posix posix_only
--		$(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-leaps right_only
-+		rm -fr '$(DESTDIR)$(TZDIR)-posix'
-+		ln -s '$(TZDIR_BASENAME)' '$(DESTDIR)$(TZDIR)-posix' || \
-+		  $(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-posix' posix_only
-+		$(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-leaps' right_only
- 
- # This obsolescent rule is present for backwards compatibility with
- # tz releases 2014g through 2015g.  It should go away eventually.
-@@ -764,7 +764,7 @@ set-timestamps.out: $(ENCHILADA)
- 
- check_public:
- 		$(MAKE) maintainer-clean
--		$(MAKE) "CFLAGS=$(GCC_DEBUG_FLAGS)" ALL
-+		$(MAKE) CFLAGS='$(GCC_DEBUG_FLAGS)' ALL
- 		mkdir -p public.dir
- 		for i in $(TDATA) tzdata.zi; do \
- 		  $(zic) -v -d public.dir $$i 2>&1 || exit; \
-diff --git a/NEWS b/NEWS
-index bd2bec2..75ab095 100644
---- a/NEWS
-+++ b/NEWS
-@@ -1,5 +1,13 @@
- News for the tz database
- 
-+Unreleased, experimental changes
-+
-+  Changes to build procedure
-+
-+    The Makefile now quotes values like BACKWARD more carefully when
-+    passing them to the shell.  (Problem reported by Zefram.)
-+
-+
- Release 2017c - 2017-10-20 14:49:34 -0700
- 
-   Briefly:
--- 
-2.13.6
-
diff --git a/SPECS/tzdata.spec b/SPECS/tzdata.spec
index b94ac56..fd2a3ba 100644
--- a/SPECS/tzdata.spec
+++ b/SPECS/tzdata.spec
@@ -1,8 +1,8 @@
 Summary: Timezone data
 Name: tzdata
-Version: 2017c
-%define tzdata_version 2017c
-%define tzcode_version 2017c
+Version: 2018c
+%define tzdata_version 2018c
+%define tzcode_version 2018c
 Release: 1%{?dist}
 License: Public Domain
 Group: System Environment/Base
@@ -10,7 +10,6 @@ URL: https://www.iana.org/time-zones
 Source0: ftp://ftp.iana.org/tz/releases/tzdata%{tzdata_version}.tar.gz
 Source1: ftp://ftp.iana.org/tz/releases/tzcode%{tzcode_version}.tar.gz
 
-Patch001: 0001-Fix-Makefile-quoting-bug.patch
 Patch002: 0002-Fix-have-snprintf-error.patch
 
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
@@ -43,7 +42,6 @@ This package contains timezone information for use by Java runtimes.
 
 %prep
 %setup -q -c -a 1
-%patch001 -p1
 %patch002 -p1
 
 mkdir javazic
@@ -84,7 +82,7 @@ zic -y ./yearistype -d zoneinfo -L /dev/null -p America/New_York $FILES
 zic -y ./yearistype -d zoneinfo/posix -L /dev/null $FILES
 zic -y ./yearistype -d zoneinfo/right -L leapseconds $FILES
 
-grep -v tz-art.htm tz-link.htm > tz-link.html
+# grep -v tz-art.htm tz-link.htm > tz-link.html
 
 # Java 6/7 tzdata
 pushd javazic
@@ -123,7 +121,8 @@ rm -rf $RPM_BUILD_ROOT
 %{_datadir}/zoneinfo
 %doc README
 %doc theory.html
-%doc tz-link.htm
+%doc tz-link.html
+%doc tz-art.html
 
 %files java
 %defattr(-,root,root)
@@ -131,6 +130,18 @@ rm -rf $RPM_BUILD_ROOT
 %{_datadir}/javazi-1.8
 
 %changelog
+* Tue Jan 23 2018 Patsy Franklin <pfrankli@redhat.com> - 2018c-1
+- Rebase to tzdata-2018c
+  - Revert the Irish time changes that relied on negative DST offsets.
+
+* Thu Jan 18 2018 Patsy Franklin <pfrankli@redhat.com> - 2018b-1
+- Rebase to tzdata-2018b
+  - São Tomé and Príncipe changed from +00 to +01 on January 1, 2018
+  - Brazil's DST will start on the first Sunday in November
+  - Irish standard time is in the summer now, not the winter.
+  - Support for the new zic -t option.
+  - Add back pacificnew file omitted in tzdata-2018a
+
 * Mon Oct 23 2017 Patsy Franklin <pfrankli@redhat.com> - 2017c-1
 - Rebase to tzdata-2017c.
   - Northern Cyprus will revert to using EQ rules on October 29, 2017.