diff --git a/server/model/maintenance.js b/server/model/maintenance.js
index 945e4d975..3d0595a75 100644
--- a/server/model/maintenance.js
+++ b/server/model/maintenance.js
@@ -1,9 +1,7 @@
-const dayjs = require("dayjs");
 const { BeanModel } = require("redbean-node/dist/bean-model");
-const { parseTimeObject, parseTimeFromTimeObject } = require("../../src/util");
+const { parseTimeObject, parseTimeFromTimeObject, isoToUTCDateTime, utcToISODateTime } = require("../../src/util");
 const { isArray } = require("chart.js/helpers");
 const { timeObjectToUTC, timeObjectToLocal } = require("../util-server");
-const { R } = require("redbean-node");
 
 class Maintenance extends BeanModel {
 
@@ -15,20 +13,11 @@ class Maintenance extends BeanModel {
      */
     async toPublicJSON(timezone = null) {
 
-        let dateTimeRange = [];
-        if (this.start_datetime) {
-
-            dateTimeRange.push(dayjs.utc(this.start_datetime).toISOString());
-            if (this.end_datetime) {
-                dateTimeRange.push(dayjs.utc(this.end_datetime).toISOString());
-            }
-        }
-
         let dateRange = [];
         if (this.start_date) {
-            dateRange.push(dayjs.utc(this.start_date).toISOString());
+            dateRange.push(utcToISODateTime(this.start_date));
             if (this.end_date) {
-                dateRange.push(dayjs.utc(this.end_date).toISOString());
+                dateRange.push(utcToISODateTime(this.end_date));
             }
         }
 
@@ -55,7 +44,6 @@ class Maintenance extends BeanModel {
             strategy: this.strategy,
             intervalDay: this.interval_day,
             active: !!this.active,
-            dateTimeRange: dateTimeRange,
             dateRange: dateRange,
             timeRange: timeRange,
             weekdays: (this.weekdays) ? JSON.parse(this.weekdays) : [],
@@ -104,18 +92,10 @@ class Maintenance extends BeanModel {
         bean.active = obj.active;
 
         if (obj.dateRange[0]) {
-            bean.start_date = R.isoDate(dayjs(obj.dateRange[0]).utc());
+            bean.start_date = isoToUTCDateTime(obj.dateRange[0]);
 
             if (obj.dateRange[1]) {
-                bean.end_date = R.isoDate(dayjs(obj.dateRange[1]).utc());
-            }
-        }
-
-        if (obj.dateTimeRange[0]) {
-            bean.start_datetime = R.isoDateTime(dayjs(obj.dateTimeRange[0]).utc());
-
-            if (obj.dateTimeRange[1]) {
-                bean.end_datetime = R.isoDateTime(dayjs(obj.dateTimeRange[1]).utc());
+                bean.end_date = isoToUTCDateTime(obj.dateRange[1]);
             }
         }
 
diff --git a/server/model/maintenance_timeslot.js b/server/model/maintenance_timeslot.js
index 7917dd697..0ac5158d2 100644
--- a/server/model/maintenance_timeslot.js
+++ b/server/model/maintenance_timeslot.js
@@ -36,8 +36,8 @@ class MaintenanceTimeslot extends BeanModel {
         } else if (maintenance.strategy === "single") {
             let bean = R.dispense("maintenance_timeslot");
             bean.maintenance_id = maintenance.id;
-            bean.start_date = maintenance.start_datetime;
-            bean.end_date = maintenance.end_datetime;
+            bean.start_date = maintenance.start_date;
+            bean.end_date = maintenance.end_date;
             bean.generated_next = true;
             await R.store(bean);
         } else {
diff --git a/src/pages/EditMaintenance.vue b/src/pages/EditMaintenance.vue
index 640962d7d..be9f7ce4d 100644
--- a/src/pages/EditMaintenance.vue
+++ b/src/pages/EditMaintenance.vue
@@ -103,7 +103,7 @@
                                 <div class="my-3">
                                     <label class="form-label">{{ $t("DateTime Range") }}</label>
                                     <Datepicker
-                                        v-model="maintenance.dateTimeRange"
+                                        v-model="maintenance.dateRange"
                                         :dark="$root.isDark"
                                         range textInput
                                         :monthChangeOnScroll="false"
@@ -369,8 +369,7 @@ export default {
                     strategy: "single",
                     active: 1,
                     intervalDay: 1,
-                    dateTimeRange: [ this.minDate ],
-                    dateRange: [],
+                    dateRange: [ this.minDate ],
                     timeRange: [{
                         hours: 2,
                         minutes: 0,
diff --git a/src/util.js b/src/util.js
index 15427cddb..1fee0eaa9 100644
--- a/src/util.js
+++ b/src/util.js
@@ -7,9 +7,8 @@
 // Backend uses the compiled file util.js
 // Frontend uses util.ts
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.parseTimeFromTimeObject = exports.parseTimeObject = exports.getMaintenanceRelativeURL = exports.getMonitorRelativeURL = exports.genSecret = exports.getCryptoRandomInt = exports.getRandomInt = exports.getRandomArbitrary = exports.TimeLogger = exports.polyfill = exports.log = exports.debug = exports.ucfirst = exports.sleep = exports.flipStatus = exports.STATUS_PAGE_MAINTENANCE = exports.STATUS_PAGE_PARTIAL_DOWN = exports.STATUS_PAGE_ALL_UP = exports.STATUS_PAGE_ALL_DOWN = exports.MAINTENANCE = exports.PENDING = exports.UP = exports.DOWN = exports.appName = exports.isDev = void 0;
-const _dayjs = require("dayjs");
-const dayjs = _dayjs;
+exports.utcToISODateTime = exports.isoToUTCDateTime = exports.parseTimeFromTimeObject = exports.parseTimeObject = exports.getMaintenanceRelativeURL = exports.getMonitorRelativeURL = exports.genSecret = exports.getCryptoRandomInt = exports.getRandomInt = exports.getRandomArbitrary = exports.TimeLogger = exports.polyfill = exports.log = exports.debug = exports.ucfirst = exports.sleep = exports.flipStatus = exports.STATUS_PAGE_MAINTENANCE = exports.STATUS_PAGE_PARTIAL_DOWN = exports.STATUS_PAGE_ALL_UP = exports.STATUS_PAGE_ALL_DOWN = exports.MAINTENANCE = exports.PENDING = exports.UP = exports.DOWN = exports.appName = exports.isDev = void 0;
+const dayjs = require("dayjs");
 exports.isDev = process.env.NODE_ENV === "development";
 exports.appName = "Uptime Kuma";
 exports.DOWN = 0;
@@ -351,3 +350,14 @@ function parseTimeFromTimeObject(obj) {
     return result;
 }
 exports.parseTimeFromTimeObject = parseTimeFromTimeObject;
+function isoToUTCDateTime(input) {
+    return dayjs(input).utc().format("YYYY-MM-DD HH:mm:ss");
+}
+exports.isoToUTCDateTime = isoToUTCDateTime;
+/**
+ * @param input
+ */
+function utcToISODateTime(input) {
+    return dayjs.utc(input).toISOString();
+}
+exports.utcToISODateTime = utcToISODateTime;
diff --git a/src/util.ts b/src/util.ts
index cb51250b9..16511afa7 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -6,8 +6,10 @@
 // Backend uses the compiled file util.js
 // Frontend uses util.ts
 
-import * as _dayjs from "dayjs";
-const dayjs = _dayjs;
+import * as dayjs  from "dayjs";
+import * as timezone from "dayjs/plugin/timezone";
+import * as utc from "dayjs/plugin/utc";
+import {R} from "redbean-node";
 
 export const isDev = process.env.NODE_ENV === "development";
 export const appName = "Uptime Kuma";
@@ -392,3 +394,14 @@ export function parseTimeFromTimeObject(obj : any) {
     return result;
 }
 
+
+export function isoToUTCDateTime(input : string) {
+    return dayjs(input).utc().format("YYYY-MM-DD HH:mm:ss");
+}
+
+/**
+ * @param input
+ */
+export function utcToISODateTime(input : string) {
+    return dayjs.utc(input).toISOString();
+}