diff --git a/client/thirdparty/jquery-validate/localization/methods_de.js b/client/thirdparty/jquery-validate/localization/methods_de.js
index 470133e..4e9980d 100755
--- a/client/thirdparty/jquery-validate/localization/methods_de.js
+++ b/client/thirdparty/jquery-validate/localization/methods_de.js
@@ -12,7 +12,7 @@
  */
 $.extend($.validator.methods, {
 	date: function(value, element) {
-		return this.optional(element) || /^\d\d?\.\d\d?\.\d\d\d?\d?$/.test(value);
+		return this.optional(element) || /^[\d]{1,4}\-[0-1][0-9]\-[0-3][0-9]?$/.test(value);
 	},
 	number: function(value, element) {
 		return this.optional(element) || /^-?(?:\d+|\d{1,3}(?:\.\d{3})+)(?:,\d+)?$/.test(value);
diff --git a/client/thirdparty/jquery-validate/localization/methods_de.min.js b/client/thirdparty/jquery-validate/localization/methods_de.min.js
index 0cfea5e..4c64e3e 100755
--- a/client/thirdparty/jquery-validate/localization/methods_de.min.js
+++ b/client/thirdparty/jquery-validate/localization/methods_de.min.js
@@ -1,4 +1,4 @@
 /*! jQuery Validation Plugin - v1.13.1 - 10/14/2014
  * http://jqueryvalidation.org/
  * Copyright (c) 2014 Jörn Zaefferer; Licensed MIT */
-!function(a){"function"==typeof define&&define.amd?define(["jquery","../jquery.validate.min"],a):a(jQuery)}(function(a){a.extend(a.validator.methods,{date:function(a,b){return this.optional(b)||/^\d\d?\.\d\d?\.\d\d\d?\d?$/.test(a)},number:function(a,b){return this.optional(b)||/^-?(?:\d+|\d{1,3}(?:\.\d{3})+)(?:,\d+)?$/.test(a)}})});
\ No newline at end of file
+!function(a){"function"==typeof define&&define.amd?define(["jquery","../jquery.validate.min"],a):a(jQuery)}(function(a){a.extend(a.validator.methods,{date:function(a,b){return this.optional(b)||/^[\d]{1,4}\-[0-1][0-9]\-[0-3][0-9]?$/.test(a)},number:function(a,b){return this.optional(b)||/^-?(?:\d+|\d{1,3}(?:\.\d{3})+)(?:,\d+)?$/.test(a)}})});
\ No newline at end of file
diff --git a/client/thirdparty/jquery-validate/localization/methods_nl.js b/client/thirdparty/jquery-validate/localization/methods_nl.js
index 91e0d8c..d033509 100755
--- a/client/thirdparty/jquery-validate/localization/methods_nl.js
+++ b/client/thirdparty/jquery-validate/localization/methods_nl.js
@@ -12,7 +12,7 @@
  */
 $.extend($.validator.methods, {
 	date: function(value, element) {
-		return this.optional(element) || /^\d\d?[\.\/\-]\d\d?[\.\/\-]\d\d\d?\d?$/.test(value);
+		return this.optional(element) || /^[\d]{1,4}\-[0-1][0-9]\-[0-3][0-9]?$/.test(value);
 	}
 });
 
diff --git a/client/thirdparty/jquery-validate/localization/methods_nl.min.js b/client/thirdparty/jquery-validate/localization/methods_nl.min.js
index b3fa94a..f527c37 100755
--- a/client/thirdparty/jquery-validate/localization/methods_nl.min.js
+++ b/client/thirdparty/jquery-validate/localization/methods_nl.min.js
@@ -1,4 +1,4 @@
 /*! jQuery Validation Plugin - v1.13.1 - 10/14/2014
  * http://jqueryvalidation.org/
  * Copyright (c) 2014 Jörn Zaefferer; Licensed MIT */
-!function(a){"function"==typeof define&&define.amd?define(["jquery","../jquery.validate.min"],a):a(jQuery)}(function(a){a.extend(a.validator.methods,{date:function(a,b){return this.optional(b)||/^\d\d?[\.\/\-]\d\d?[\.\/\-]\d\d\d?\d?$/.test(a)}})});
\ No newline at end of file
+!function(a){"function"==typeof define&&define.amd?define(["jquery","../jquery.validate.min"],a):a(jQuery)}(function(a){a.extend(a.validator.methods,{date:function(a,b){return this.optional(b)||/^[\d]{1,4}\-[0-1][0-9]\-[0-3][0-9]?$/.test(a)}})});
\ No newline at end of file