diff --git a/icu4c/source/allinone/allinone.dsw b/icu4c/source/allinone/allinone.dsw
index e7b8763f99..28b1342ce4 100644
--- a/icu4c/source/allinone/allinone.dsw
+++ b/icu4c/source/allinone/allinone.dsw
@@ -54,9 +54,6 @@ Package=<4>
     Project_Dep_Name gentest
     End Project Dependency
     Begin Project Dependency
-    Project_Dep_Name gentz
-    End Project Dependency
-    Begin Project Dependency
     Project_Dep_Name genuca
     End Project Dependency
     Begin Project Dependency
@@ -393,24 +390,6 @@ Package=<4>
 
 ###############################################################################
 
-Project: "gentz"=..\tools\gentz\gentz.dsp - Package Owner=<4>
-
-Package=<5>
-{{{
-}}}
-
-Package=<4>
-{{{
-    Begin Project Dependency
-    Project_Dep_Name common
-    End Project Dependency
-    Begin Project Dependency
-    Project_Dep_Name toolutil
-    End Project Dependency
-}}}
-
-###############################################################################
-
 Project: "genuca"=..\TOOLS\genuca\genuca.dsp - Package Owner=<4>
 
 Package=<5>
@@ -597,9 +576,6 @@ Package=<4>
     Project_Dep_Name gentest
     End Project Dependency
     Begin Project Dependency
-    Project_Dep_Name gentz
-    End Project Dependency
-    Begin Project Dependency
     Project_Dep_Name genuca
     End Project Dependency
     Begin Project Dependency
diff --git a/icu4c/source/data/Makefile.in b/icu4c/source/data/Makefile.in
index cb411ef5f3..39079bd87e 100644
--- a/icu4c/source/data/Makefile.in
+++ b/icu4c/source/data/Makefile.in
@@ -137,7 +137,7 @@ package390: $(BUILDDIR)/icudata390.lst $(BUILDDIR)/icudata.lst ./icupkg.inc
 ##### Define all the data files. the build rule that depends on them is below.
 
 ## DAT files - Misc. data files.
-DAT_FILES_SHORT=uprops.icu pnames.icu unames.icu unorm.icu cnvalias.icu tz.icu ucadata.icu invuca.icu uidna.spp 
+DAT_FILES_SHORT=uprops.icu pnames.icu unames.icu unorm.icu cnvalias.icu ucadata.icu invuca.icu uidna.spp 
 DAT_FILES=$(DAT_FILES_SHORT:%=$(BUILDDIR)/$(ICUDT)%)
 
 ## BRK files
@@ -234,10 +234,6 @@ $(BUILDDIR)/$(ICUDT)unames.icu: $(UNICODEDATADIR)/UnicodeData.txt $(TOOLDIR)/gen
 $(BUILDDIR)/$(ICUDT)cnvalias.icu: $(UCMSRCDIR)/convrtrs.txt $(TOOLDIR)/gencnval/gencnval$(EXEEXT)
 	ICU_DATA=$(BUILDDIR) $(INVOKE) $(TOOLDIR)/gencnval/gencnval -d $(BUILDDIR) $(UCMSRCDIR)/convrtrs.txt
 
-# tz.icu
-$(BUILDDIR)/$(ICUDT)tz.icu: $(MISCSRCDIR)/timezone.txt $(TOOLDIR)/gentz/gentz$(EXEEXT)
-	ICU_DATA=$(BUILDDIR) $(INVOKE) $(TOOLDIR)/gentz/gentz -d $(BUILDDIR) $(MISCSRCDIR)/timezone.txt
-
 # uidna.spp
 $(BUILDDIR)/$(ICUDT)uidna.spp: $(MISCSRCDIR)/NamePrepProfile.txt $(TOOLDIR)/gensprep/gensprep$(EXEEXT) $(BUILDDIR)/$(ICUDT)uprops.icu $(BUILDDIR)/$(ICUDT)unames.icu $(BUILDDIR)/$(ICUDT)pnames.icu
 	ICU_DATA=$(BUILDDIR) $(INVOKE) $(TOOLDIR)/gensprep/gensprep -d $(BUILDDIR) -s $(MISCSRCDIR) -b uidna -n $(UNICODEDATADIR) -u 3.2.0 -k NamePrepProfile.txt
diff --git a/icu4c/source/data/makedata.mak b/icu4c/source/data/makedata.mak
index 8b06744c72..ff98858c5f 100644
--- a/icu4c/source/data/makedata.mak
+++ b/icu4c/source/data/makedata.mak
@@ -261,7 +261,7 @@ BRK_FILES = $(ICUDT)sent.brk $(ICUDT)char.brk $(ICUDT)line.brk $(ICUDT)word.brk
 #  move the .dll and .lib files to their final destination afterwards.
 #  The $(U_ICUDATA_NAME).lib and $(U_ICUDATA_NAME).exp should already be in the right place due to stubdata.
 #
-"$(DLL_OUTPUT)\$(U_ICUDATA_NAME).dll" : "$(ICUTOOLS)\pkgdata\$(CFG)\pkgdata.exe" $(CNV_FILES) $(BRK_FILES) "$(ICUBLD)\$(ICUDT)uprops.icu" "$(ICUBLD)\$(ICUDT)unames.icu" "$(ICUBLD)\$(ICUDT)pnames.icu" "$(ICUBLD)\$(ICUDT)unorm.icu" "$(ICUBLD)\$(ICUDT)cnvalias.icu" "$(ICUBLD)\$(ICUDT)tz.icu" "$(ICUBLD)\$(ICUDT)ucadata.icu" "$(ICUBLD)\$(ICUDT)invuca.icu" "$(ICUBLD)\$(ICUDT)uidna.spp" $(ALL_RES) "$(ICUBLD)\$(ICUDT)icudata.res" "$(ICUP)\source\stubdata\stubdatabuilt.txt"
+"$(DLL_OUTPUT)\$(U_ICUDATA_NAME).dll" : "$(ICUTOOLS)\pkgdata\$(CFG)\pkgdata.exe" $(CNV_FILES) $(BRK_FILES) "$(ICUBLD)\$(ICUDT)uprops.icu" "$(ICUBLD)\$(ICUDT)unames.icu" "$(ICUBLD)\$(ICUDT)pnames.icu" "$(ICUBLD)\$(ICUDT)unorm.icu" "$(ICUBLD)\$(ICUDT)cnvalias.icu" "$(ICUBLD)\$(ICUDT)ucadata.icu" "$(ICUBLD)\$(ICUDT)invuca.icu" "$(ICUBLD)\$(ICUDT)uidna.spp" $(ALL_RES) "$(ICUBLD)\$(ICUDT)icudata.res" "$(ICUP)\source\stubdata\stubdatabuilt.txt"
 	@echo Building icu data
 	@cd "$(ICUBLD)"
  	@"$(ICUTOOLS)\pkgdata\$(CFG)\pkgdata" -f -e $(U_ICUDATA_NAME) -v -m dll -c -p $(ICUPKG) -O "$(PKGOPT)" -d "$(ICUBLD)" -s . <<pkgdatain.txt
@@ -272,7 +272,6 @@ $(ICUDT)unames.icu
 $(ICUDT)ucadata.icu
 $(ICUDT)invuca.icu
 $(ICUDT)uidna.spp
-$(ICUDT)tz.icu
 $(ICUDT)cnvalias.icu
 $(CNV_FILES:.cnv =.cnv
 )
@@ -422,12 +421,6 @@ res_index {
 	@set ICU_DATA=$(ICUBLD)
 	@"$(ICUTOOLS)\gencnval\$(CFG)\gencnval" "$(ICUSRCDATA)\$(ICUUCM)\convrtrs.txt"
 
-# Targets for tz
-"$(ICUBLD)\$(ICUDT)tz.icu" : {"$(ICUMISC)"}timezone.txt {"$(ICUTOOLS)\gentz\$(CFG)"}gentz.exe
-	@echo Creating data file for Timezones
-	@set ICU_DATA=$(ICUBLD)
-	@"$(ICUTOOLS)\gentz\$(CFG)\gentz" "$(ICUMISC)\timezone.txt"
-
 # Targets for ucadata.icu & invuca.icu
 "$(ICUBLD)\$(ICUDT)invuca.icu" "$(ICUBLD)\$(ICUDT)ucadata.icu": "$(ICUUNIDATA)\FractionalUCA.txt" "$(ICUTOOLS)\genuca\$(CFG)\genuca.exe" $(ICUDT)uprops.icu $(ICUDT)unorm.icu
 	@echo Creating UCA data files