diff --git a/src/stores/mixin.ts b/src/stores/mixin.ts
index 42e969e6..f40719f7 100644
--- a/src/stores/mixin.ts
+++ b/src/stores/mixin.ts
@@ -3,6 +3,7 @@ import "moment/dist/locale/th";
 import moment from "moment";
 import CustomComponent from "@/components/CustomDialog.vue";
 import { Loading, QSpinnerCube } from "quasar";
+import { format, utcToZonedTime } from "date-fns-tz";
 
 moment.locale("th");
 
@@ -1078,6 +1079,20 @@ export const useCounterMixin = defineStore("mixin", () => {
     });
   }
 
+  // กรณีมีเฉพาะ date
+  function convertDateToAPI(date: Date | null) {
+    return date
+      ? format(utcToZonedTime(date, "Asia/Bangkok"), "yyyy-MM-dd")
+      : null;
+  }
+
+  // กรณี datetime
+  function convertDatetimeToAPI(date: Date | null) {
+    return date
+      ? format(utcToZonedTime(date, "Asia/Bangkok"), "yyyy-MM-dd HH:mm:ss")
+      : null;
+  }
+
   return {
     calAge,
     date2Thai,
@@ -1121,5 +1136,8 @@ export const useCounterMixin = defineStore("mixin", () => {
     findPosMasterNoOld,
 
     onSearchDataTable,
+
+    convertDateToAPI,
+    convertDatetimeToAPI,
   };
 });