diff --git a/src/app/core/json-patch/builder/json-patch-operations-builder.ts b/src/app/core/json-patch/builder/json-patch-operations-builder.ts
index af2ea3496c..c45183b4ef 100644
--- a/src/app/core/json-patch/builder/json-patch-operations-builder.ts
+++ b/src/app/core/json-patch/builder/json-patch-operations-builder.ts
@@ -8,7 +8,7 @@ import {
 import { JsonPatchOperationPathObject } from './json-patch-operation-path-combiner';
 import { Injectable } from '@angular/core';
 import { isEmpty, isNotEmpty } from '../../../shared/empty.util';
-import { dateToGMTString } from '../../../shared/date.util';
+import { dateToISOFormat } from '../../../shared/date.util';
 import { AuthorityValue } from '../../integration/models/authority.value';
 import { FormFieldMetadataValueObject } from '../../../shared/form/builder/models/form-field-metadata-value.model';
 import { FormFieldLanguageValueObject } from '../../../shared/form/builder/models/form-field-language-value.model';
@@ -105,7 +105,7 @@ export class JsonPatchOperationsBuilder {
     if (isEmpty(value) || value instanceof FormFieldMetadataValueObject) {
       operationValue = value;
     } else if (value instanceof Date) {
-      operationValue = new FormFieldMetadataValueObject(dateToGMTString(value));
+      operationValue = new FormFieldMetadataValueObject(dateToISOFormat(value));
     } else if (value instanceof AuthorityValue) {
       operationValue = this.prepareAuthorityValue(value);
     } else if (value instanceof FormFieldLanguageValueObject) {
diff --git a/src/app/shared/date.util.ts b/src/app/shared/date.util.ts
index 8be4235643..5e91871967 100644
--- a/src/app/shared/date.util.ts
+++ b/src/app/shared/date.util.ts
@@ -1,19 +1,39 @@
 import { NgbDateStruct } from '@ng-bootstrap/ng-bootstrap';
 
 import { isObject } from 'lodash';
+import * as moment from 'moment';
 
-export function isDateObject(value) {
+/**
+ * Returns true if the passed value is a NgbDateStruct.
+ *
+ * @param value
+ *    The object to check
+ * @return boolean
+ *    true if the passed value is a NgbDateStruct, false otherwise
+ */
+export function isNgbDateStruct(value: object): boolean {
   return isObject(value) && value.hasOwnProperty('day')
     && value.hasOwnProperty('month')  && value.hasOwnProperty('year');
 }
 
-export function dateToGMTString(date: Date | NgbDateStruct) {
-  let year = ((date instanceof Date) ? date.getFullYear() : date.year).toString();
-  let month = ((date instanceof Date) ? date.getMonth() + 1 : date.month).toString();
-  let day = ((date instanceof Date) ? date.getDate() : date.day).toString();
-  let hour = ((date instanceof Date) ? date.getHours() : 0).toString();
-  let min = ((date instanceof Date) ? date.getMinutes() : 0).toString();
-  let sec = ((date instanceof Date) ? date.getSeconds() : 0).toString();
+/**
+ * Returns a date in simplified extended ISO format (YYYY-MM-DDTHH:mm:ssZ).
+ * The timezone is always zero UTC offset, as denoted by the suffix "Z"
+ *
+ * @param date
+ *    The date to format
+ * @return string
+ *    the formatted date
+ */
+export function dateToISOFormat(date: Date | NgbDateStruct): string {
+  const dateObj: Date = (date instanceof Date) ? date : ngbDateStructToDate(date);
+
+  let year = dateObj.getFullYear().toString();
+  let month = (dateObj.getMonth() + 1).toString();
+  let day = dateObj.getDate().toString();
+  let hour = dateObj.getHours().toString();
+  let min = dateObj.getMinutes().toString();
+  let sec = dateObj.getSeconds().toString();
 
   year = (year.length === 1) ? '0' + year : year;
   month = (month.length === 1) ? '0' + month : month;
@@ -21,6 +41,18 @@ export function dateToGMTString(date: Date | NgbDateStruct) {
   hour = (hour.length === 1) ? '0' + hour : hour;
   min = (min.length === 1) ? '0' + min : min;
   sec = (sec.length === 1) ? '0' + sec : sec;
-  return `${year}-${month}-${day}T${hour}:${min}:${sec}Z`;
-
+  const dateStr = `${year}${month}${day}${hour}${min}${sec}`;
+  return moment.utc(dateStr, 'YYYYMMDDhhmmss').format();
+}
+
+/**
+ * Returns a Date object started from a NgbDateStruct object
+ *
+ * @param date
+ *    The NgbDateStruct to convert
+ * @return Date
+ *    the Date object
+ */
+export function ngbDateStructToDate(date: NgbDateStruct): Date {
+  return new Date(date.year, (date.month - 1), date.day);
 }
diff --git a/src/app/shared/form/builder/form-builder.service.ts b/src/app/shared/form/builder/form-builder.service.ts
index 630e9280ff..21e702aabb 100644
--- a/src/app/shared/form/builder/form-builder.service.ts
+++ b/src/app/shared/form/builder/form-builder.service.ts
@@ -28,7 +28,7 @@ import {
 import { DynamicRowArrayModel } from './ds-dynamic-form-ui/models/ds-dynamic-row-array-model';
 import { DsDynamicInputModel } from './ds-dynamic-form-ui/models/ds-dynamic-input.model';
 import { FormFieldMetadataValueObject } from './models/form-field-metadata-value.model';
-import { isDateObject } from '../../date.util';
+import { isNgbDateStruct } from '../../date.util';
 
 @Injectable()
 export class FormBuilderService extends DynamicFormService {
@@ -109,7 +109,7 @@ export class FormBuilderService extends DynamicFormService {
       } else if (isObject(controlValue)) {
         const authority = controlValue.authority || controlValue.id || null;
         const place = controlModelIndex || controlValue.place;
-        if (isDateObject(controlValue)) {
+        if (isNgbDateStruct(controlValue)) {
           return new FormFieldMetadataValueObject(controlValue, controlLanguage, authority, controlValue, place);
         } else {
           return new FormFieldMetadataValueObject(controlValue.value, controlLanguage, authority, controlValue.display, place, controlValue.confidence);
diff --git a/src/app/submission/sections/upload/file/file.component.ts b/src/app/submission/sections/upload/file/file.component.ts
index f23358a09c..572e91cf2b 100644
--- a/src/app/submission/sections/upload/file/file.component.ts
+++ b/src/app/submission/sections/upload/file/file.component.ts
@@ -12,7 +12,7 @@ import { JsonPatchOperationPathCombiner } from '../../../../core/json-patch/buil
 import { WorkspaceitemSectionUploadFileObject } from '../../../../core/submission/models/workspaceitem-section-upload-file.model';
 import { SubmissionFormsModel } from '../../../../core/config/models/config-submission-forms.model';
 import { deleteProperty } from '../../../../shared/object.util';
-import { dateToGMTString } from '../../../../shared/date.util';
+import { dateToISOFormat } from '../../../../shared/date.util';
 import { SubmissionService } from '../../../submission.service';
 import { FileService } from '../../../../core/shared/file.service';
 import { HALEndpointService } from '../../../../core/shared/hal-endpoint.service';
@@ -144,12 +144,12 @@ export class UploadSectionFileComponent implements OnChanges, OnInit {
                 accessConditionOpt.groupUUID = this.retrieveValueFromField(accessCondition.groupUUID);
                 if (accessCondition.startDate) {
                   const startDate = this.retrieveValueFromField(accessCondition.startDate);
-                  accessConditionOpt.startDate = dateToGMTString(startDate);
+                  accessConditionOpt.startDate = dateToISOFormat(startDate);
                   accessConditionOpt = deleteProperty(accessConditionOpt, 'endDate');
                 }
                 if (accessCondition.endDate) {
                   const endDate = this.retrieveValueFromField(accessCondition.endDate);
-                  accessConditionOpt.endDate = dateToGMTString(endDate);
+                  accessConditionOpt.endDate = dateToISOFormat(endDate);
                   accessConditionOpt = deleteProperty(accessConditionOpt, 'startDate');
                 }
                 accessConditionsToSave.push(accessConditionOpt);