diff --git a/src/types/migration.ts b/src/types/migration.ts
new file mode 100644
index 0000000..c4760b7
--- /dev/null
+++ b/src/types/migration.ts
@@ -0,0 +1,22 @@
+const FMT_VER_0 = 0
+const FMT_VER_LATEST = FMT_VER_0
+
+function migrate_A_to_0(e: journey): journey {
+    e.title = e.name;
+    e.main.forEach((v) => {
+        v.date_range = v.date_range || (v as any).dateRange;
+        v.day_title = v.day_title || (v as any).step_title;
+        v.travel;
+    })
+    console.log(e)
+    return e;
+}
+
+export const migrator = (e: journey): journey => {
+    if (e.fmt_ver == FMT_VER_LATEST) return e;
+    switch (e.fmt_ver) {
+        case FMT_VER_0: break; // Update when FMT_VER_1 releases
+        default:
+            return migrate_A_to_0(e)
+    }
+}
\ No newline at end of file