diff --git a/CHANGELOG.md b/CHANGELOG.md
index aded26a..f6afffc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,7 @@ For major (breaking) changes - version 3 and 2 see end of page.
 
 | Version        | Date           | Comment  |
 | -------------- | -------------- | -------- |
+| 4.23.4         | 2020-04-20     | `users()` optimized parseDateTime function |
 | 4.23.3         | 2020-04-09     | recactored to avoid `cat` |
 | 4.23.2         | 2020-04-08     | `cpu()` fixed getting base frequency for AMD Ryzen |
 | 4.23.1         | 2020-03-11     | `diskLayout()` optimized detection linux |
diff --git a/docs/history.html b/docs/history.html
index 09c6264..fa06ce9 100644
--- a/docs/history.html
+++ b/docs/history.html
@@ -83,6 +83,11 @@
                   </tr>
                 </thead>
                 <tbody>
+                  <tr>
+                    <th scope="row">4.23.4</th>
+                    <td>2020-04-20</td>
+                    <td><span class="code">users()</span> optimized parseDateTime function</td>
+                  </tr>
                   <tr>
                     <th scope="row">4.23.3</th>
                     <td>2020-04-09</td>
diff --git a/docs/index.html b/docs/index.html
index d1396ab..0f685aa 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -207,7 +207,7 @@
         <div class="title">Downloads last month</div>
       </div>
       <div class="col-xl-4 col-lg-4 col-md-4 col-12">
-        <div class="numbers">261</div>
+        <div class="numbers">266</div>
         <div class="title">Dependends</div>
       </div>
     </div>
diff --git a/lib/users.js b/lib/users.js
index 0ce67c6..ce2f35d 100644
--- a/lib/users.js
+++ b/lib/users.js
@@ -26,9 +26,42 @@ const _openbsd = (_platform === 'openbsd');
 const _netbsd = (_platform === 'netbsd');
 const _sunos = (_platform === 'sunos');
 
+let _winDateFormat = {
+  dateFormat: '',
+  dateSeperator: '',
+  timeFormat: '',
+  timeSeperator: '',
+  amDesignator: ''
+};
+
 // --------------------------
 // array of users online = sessions
 
+function getWinCulture() {
+  return new Promise((resolve) => {
+    process.nextTick(() => {
+      if (!_winDateFormat) {
+        util.powerShell('(get-culture).DateTimeFormat')
+          .then(data => {
+            let lines = data.toString().split('\r\n');
+            _winDateFormat.dateFormat = util.getValue(lines, 'ShortDatePattern', ':');
+            _winDateFormat.dateSeperator = util.getValue(lines, 'DateSeparator', ':');
+            _winDateFormat.timeFormat = util.getValue(lines, 'ShortTimePattern', ':');
+            _winDateFormat.timeSeperator = util.getValue(lines, 'TimeSeparator', ':');
+            _winDateFormat.amDesignator = util.getValue(lines, 'AMDesignator', ':');
+
+            resolve(_winDateFormat);
+          })
+          .catch(() => {
+            resolve(_winDateFormat);
+          });
+      } else {
+        resolve(_winDateFormat);
+      }
+    });
+  });
+}
+
 function parseUsersLinux(lines, phase) {
   let result = [];
   let result_who = [];
@@ -141,7 +174,7 @@ function parseUsersDarwin(lines) {
   return result;
 }
 
-function parseUsersWin(lines) {
+function parseUsersWin(lines, culture) {
 
   let result = [];
   const header = lines[0];
@@ -164,7 +197,7 @@ function parseUsersWin(lines) {
       if (lines[i].trim()) {
         const user = lines[i].substring(headerDelimiter[0] + 1, headerDelimiter[1]).trim() || '';
         const tty = lines[i].substring(headerDelimiter[1] + 1, headerDelimiter[2] - 2).trim() || '';
-        const dateTime = util.parseDateTime(lines[i].substring(headerDelimiter[5] + 1, 2000).trim()) || '';
+        const dateTime = util.parseDateTime(lines[i].substring(headerDelimiter[5] + 1, 2000).trim(), culture) || '';
         result.push({
           user: user,
           tty: tty,
@@ -252,7 +285,10 @@ function users(callback) {
             if (stdout) {
               // lines / split
               let lines = stdout.toString().split('\r\n');
-              result = parseUsersWin(lines);
+              getWinCulture()
+                .then(culture => {
+                  result = parseUsersWin(lines, culture);
+                });
             }
             if (callback) { callback(result); }
             resolve(result);
diff --git a/lib/util.js b/lib/util.js
index 015764b..eabe497 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -119,45 +119,53 @@ function decodeEscapeSequence(str, base) {
   });
 }
 
-function parseTime(t) {
+function detectSplit(str) {
+  let seperator = '';
+  let part = 0;
+  str.split('').forEach(element => {
+    if (element >= '0' && element <= '9') {
+      if (part === 1) { part++; }
+    } else {
+      if (part === 0) { part++; }
+      if (part === 1) {
+        seperator += element;
+      }
+    }
+  });
+  return seperator;
+}
+
+function parseTime(t, timeFormat, timeSeperator) {
+  timeFormat = timeFormat || '';
+  timeSeperator = timeSeperator || '';
   t = t.toUpperCase();
   let hour = 0;
   let min = 0;
-  let parts = t.split(':');
+  let splitter = detectSplit(t);
+  let parts = t.split(splitter);
   if (parts.length >= 2) {
-    let isPM = (parts[1] && (parts[1].toLowerCase().indexOf('pm') > -1) || (parts[1].toLowerCase().indexOf('p.m.') > -1) || (parts[1].toLowerCase().indexOf('p. m.') > -1));
-    hour = parseInt(parts[0], 10);
-    min = parseInt(parts[1], 10);
-    hour = isPM && hour < 12 ? hour + 12 : hour;
-    return ('0' + hour).substr(-2) + ':' + ('0' + min).substr(-2);
-  }
-  parts = t.split('.');
-  if (parts.length >= 2) {
-    let isPM = (parts[1] && (parts[1].toLowerCase().indexOf('pm') > -1) || (parts[1].toLowerCase().indexOf('p.m.') > -1) || (parts[1].toLowerCase().indexOf('p. m.') > -1) || (parts[1].toLowerCase().indexOf('n') > -1) || (parts[1].toLowerCase().indexOf('ch') > -1) || (parts[1].toLowerCase().indexOf('ös') > -1));
-    hour = parseInt(parts[0], 10);
-    min = parseInt(parts[1], 10);
-    hour = isPM && hour < 12 ? hour + 12 : hour;
-    return ('0' + hour).substr(-2) + ':' + ('0' + min).substr(-2);
-  }
-  parts = t.split(' ');
-  if (parts.length >= 2) {
-    let isPM = ((t.toLowerCase().indexOf('pm') > -1) || (t.toLowerCase().indexOf('p.m.') > -1) || (t.toLowerCase().indexOf('p. m.') > -1) || (t.toLowerCase().indexOf('n') > -1) || (t.toLowerCase().indexOf('ch') > -1) || (t.toLowerCase().indexOf('ös') > -1));
-    hour = parseInt(parts[0], 10);
-    if (parts[1] === 'h' && parts[2]) {
-      min = parseInt(parts[2], 10);
-    } else {
-      min = parseInt(parts[1], 10);
+    if (parts[2]) {
+      parts[1] += parts[2];
     }
+    let isPM = (parts[1] && (parts[1].toLowerCase().indexOf('pm') > -1) || (parts[1].toLowerCase().indexOf('p.m.') > -1) || (parts[1].toLowerCase().indexOf('p. m.') > -1) || (parts[1].toLowerCase().indexOf('n') > -1) || (parts[1].toLowerCase().indexOf('ch') > -1) || (parts[1].toLowerCase().indexOf('ös') > -1) || timeSeperator);
+    hour = parseInt(parts[0], 10);
+    min = parseInt(parts[1], 10);
     hour = isPM && hour < 12 ? hour + 12 : hour;
     return ('0' + hour).substr(-2) + ':' + ('0' + min).substr(-2);
   }
 }
 
-function parseDateTime(dt) {
+function parseDateTime(dt, culture) {
   const result = {
     date: '',
     time: ''
   };
+  culture = culture || {};
+  let dateFormat = (culture.dateFormat || '').toLowerCase();
+  let timeFormat = (culture.timeFormat || '');
+  // let dateSeperator = (culture.dateSeperator || '');
+  let timeSeperator = (culture.timeSeperator || '');
+
   const parts = dt.split(' ');
   if (parts[0]) {
     if (parts[0].indexOf('/') >= 0) {
@@ -167,13 +175,13 @@ function parseDateTime(dt) {
         if (dtparts[0].length === 4) {
           // Dateformat: yyyy/mm/dd
           result.date = dtparts[0] + '-' + ('0' + dtparts[1]).substr(-2) + '-' + ('0' + dtparts[2]).substr(-2);
-        } else if (dtparts[2].length === 2) {
+        } else if (dtparts[2].length === 2 || dateFormat.indexOf('/mm/') > -1) {
           // Dateformat: dd/mm/yy
           result.date = '20' + dtparts[2] + '-' + ('0' + dtparts[1]).substr(-2) + '-' + ('0' + dtparts[0]).substr(-2);
         } else {
           // Dateformat: mm/dd/yyyy or dd/mm/yyyy
           const isEN = ((dt.toLowerCase().indexOf('pm') > -1) || (dt.toLowerCase().indexOf('p.m.') > -1) || (dt.toLowerCase().indexOf('p. m.') > -1) || (dt.toLowerCase().indexOf('am') > -1) || (dt.toLowerCase().indexOf('a.m.') > -1) || (dt.toLowerCase().indexOf('a. m.') > -1));
-          if (isEN) {
+          if (isEN || dateFormat.indexOf('/d/') > -1 || dateFormat.indexOf('/dd/') > -1) {
             // Dateformat: mm/dd/yyyy
             result.date = dtparts[2] + '-' + ('0' + dtparts[0]).substr(-2) + '-' + ('0' + dtparts[1]).substr(-2);
           } else {
@@ -184,10 +192,15 @@ function parseDateTime(dt) {
       }
     }
     if (parts[0].indexOf('.') >= 0) {
-      // Dateformat: dd.mm.yyyy
       const dtparts = parts[0].split('.');
       if (dtparts.length === 3) {
-        result.date = dtparts[2] + '-' + ('0' + dtparts[1]).substr(-2) + '-' + ('0' + dtparts[0]).substr(-2);
+        if (dateFormat.indexOf('.d.') > -1 || dateFormat.indexOf('.dd.') > -1) {
+          // Dateformat: mm.dd.yyyy
+          result.date = dtparts[2] + '-' + ('0' + dtparts[0]).substr(-2) + '-' + ('0' + dtparts[1]).substr(-2);
+        } else {
+        // Dateformat: dd.mm.yyyy
+          result.date = dtparts[2] + '-' + ('0' + dtparts[1]).substr(-2) + '-' + ('0' + dtparts[0]).substr(-2);
+        }
       }
     }
     if (parts[0].indexOf('-') >= 0) {
@@ -201,7 +214,7 @@ function parseDateTime(dt) {
   if (parts[1]) {
     parts.shift();
     let time = parts.join(' ');
-    result.time = parseTime(time);
+    result.time = parseTime(time, timeFormat, timeSeperator);
   }
   return result;
 }