diff --git a/prisma/migrations/20240227000000_availability_date_year/migration.sql b/prisma/migrations/20240227000000_availability_date_year/migration.sql
new file mode 100644
index 0000000..23be7c9
--- /dev/null
+++ b/prisma/migrations/20240227000000_availability_date_year/migration.sql
@@ -0,0 +1,3 @@
+UPDATE "AvailabilityDate"
+SET 
+  "date" = "date" - INTERVAL '1 year'