--- a/CLOBBER
+++ b/CLOBBER
@@ -17,9 +17,9 @@
 #
 # Modifying this file will now automatically clobber the buildbot machines \o/
 #
 
 # Are you updating CLOBBER because you think it's needed for your WebIDL
 # changes to stick? As of bug 928195, this shouldn't be necessary! Please
 # don't change CLOBBER for WebIDL changes any more.
 
-Bug 1353650 - Update to ICU 59 requires clobber
+Merge day clobber
\ No newline at end of file

--- a/browser/config/version.txt
+++ b/browser/config/version.txt
@@ -1,1 +1,1 @@
-56.0a1
+57.0a1

--- a/browser/config/version_display.txt
+++ b/browser/config/version_display.txt
@@ -1,1 +1,1 @@
-56.0a1
+57.0a1

--- a/config/milestone.txt
+++ b/config/milestone.txt
@@ -5,9 +5,9 @@
 #    x.x.x.x
 #    x.x.x+
 #
 # Referenced by milestone.py.
 # Hopefully I'll be able to automate replacement of *all*
 # hardcoded milestones in the tree from these two files.
 #--------------------------------------------------------
 
-56.0a1
+57.0a1

--- a/services/sync/modules/constants.js
+++ b/services/sync/modules/constants.js
@@ -3,17 +3,17 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 // Process each item in the "constants hash" to add to "global" and give a name
 this.EXPORTED_SYMBOLS = [];
 for (let [key, val] of Object.entries({
 
 // Don't manually modify this line, as it is automatically replaced on merge day
 // by the gecko_migration.py script.
-WEAVE_VERSION: "1.58.0",
+WEAVE_VERSION: "1.59.0",
 
 // Sync Server API version that the client supports.
 SYNC_API_VERSION:                      "1.5",
 
 // Version of the data format this client supports. The data format describes
 // how records are packaged; this is separate from the Server API version and
 // the per-engine cleartext formats.
 STORAGE_VERSION:                       5,

--- a/xpcom/components/Module.h
+++ b/xpcom/components/Module.h
@@ -17,17 +17,17 @@ namespace mozilla {
 /**
  * A module implements one or more XPCOM components. This structure is used
  * for both binary and script modules, but the registration members
  * (cids/contractids/categoryentries) are unused for modules which are loaded
  * via a module loader.
  */
 struct Module
 {
-  static const unsigned int kVersion = 56;
+  static const unsigned int kVersion = 57;
 
   struct CIDEntry;
 
   typedef already_AddRefed<nsIFactory> (*GetFactoryProcPtr)(
     const Module& module, const CIDEntry& entry);
 
   typedef nsresult (*ConstructorProcPtr)(nsISupports* aOuter,
                                          const nsIID& aIID,