diff --git a/CLOBBER b/CLOBBER
index 6ad6bb37cf83bce0f13937a3f87a4feb65dd71c4..d4cdfaff33de3dbdcbe702583c77a265d6aa799c 100644
--- a/CLOBBER
+++ b/CLOBBER
@@ -22,4 +22,4 @@
 # changes to stick? As of bug 928195, this shouldn't be necessary! Please
 # don't change CLOBBER for WebIDL changes any more.
 
-Bug 1583269 - Update to ICU 65 requires clobber
+Merge day clobber
\ No newline at end of file
diff --git a/browser/config/version.txt b/browser/config/version.txt
index 40f90c38b4a41a1e2693c27585f8233822b2266e..2a55b3b2af0604bffc19c957e24ad48447ac5ad0 100644
--- a/browser/config/version.txt
+++ b/browser/config/version.txt
@@ -1 +1 @@
-72.0a1
+73.0a1
diff --git a/browser/config/version_display.txt b/browser/config/version_display.txt
index 40f90c38b4a41a1e2693c27585f8233822b2266e..2a55b3b2af0604bffc19c957e24ad48447ac5ad0 100644
--- a/browser/config/version_display.txt
+++ b/browser/config/version_display.txt
@@ -1 +1 @@
-72.0a1
+73.0a1
diff --git a/config/milestone.txt b/config/milestone.txt
index 55a637ece916eb98667c04c488e6434a83cc91c5..38219617743366d8e63c19a8da332c6577216767 100644
--- a/config/milestone.txt
+++ b/config/milestone.txt
@@ -10,4 +10,4 @@
 # hardcoded milestones in the tree from these two files.
 #--------------------------------------------------------
 
-72.0a1
+73.0a1
diff --git a/services/sync/modules/constants.js b/services/sync/modules/constants.js
index 5d87f90a6f236397eaa0637c1f7ce5c0ca277e31..94915ccfd870ca85abcb67d06ffcc5953e0ad8fa 100644
--- a/services/sync/modules/constants.js
+++ b/services/sync/modules/constants.js
@@ -8,7 +8,7 @@ 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: "1.74.0",
+WEAVE_VERSION: "1.75.0",
 
 // Sync Server API version that the client supports.
 SYNC_API_VERSION:                      "1.5",
diff --git a/xpcom/components/Module.h b/xpcom/components/Module.h
index 7e8294105675c5c8be07baf4d8425a5fe26b8f8a..927ff85155e44e8093a7662528775246f805f728 100644
--- a/xpcom/components/Module.h
+++ b/xpcom/components/Module.h
@@ -21,7 +21,7 @@ namespace mozilla {
  * via a module loader.
  */
 struct Module {
-  static const unsigned int kVersion = 72;
+  static const unsigned int kVersion = 73;
 
   struct CIDEntry;