diff --git a/libse/BluRaySup/BluRaySupParser.cs b/libse/BluRaySup/BluRaySupParser.cs
index 9a79a4417..bac19f7a0 100644
--- a/libse/BluRaySup/BluRaySupParser.cs
+++ b/libse/BluRaySup/BluRaySupParser.cs
@@ -117,8 +117,6 @@ namespace Nikse.SubtitleEdit.Core.BluRaySup
             /// <returns>bitmap of the decoded caption</returns>
             public static Bitmap DecodeImage(PcsObject pcs, IList<OdsData> data, List<PaletteInfo> palettes)
             {
-                long ticks = DateTime.Now.Ticks;
-
                 if (pcs == null || data == null || data.Count == 0)
                     return new Bitmap(1, 1);
 
diff --git a/src/Controls/AudioVisualizer.cs b/src/Controls/AudioVisualizer.cs
index 7f9fe8dfb..6f2e86c40 100644
--- a/src/Controls/AudioVisualizer.cs
+++ b/src/Controls/AudioVisualizer.cs
@@ -779,7 +779,7 @@ namespace Nikse.SubtitleEdit.Controls
             _firstMove = true;
             if (e.Button == MouseButtons.Left)
             {
-                _buttonDownTimeTicks = DateTime.Now.Ticks;
+                _buttonDownTimeTicks = DateTime.UtcNow.Ticks;
 
                 Cursor = Cursors.VSplit;
                 double seconds = RelativeXPositionToSeconds(e.X);
@@ -1469,7 +1469,7 @@ namespace Nikse.SubtitleEdit.Controls
             if (e.Button == MouseButtons.Left && OnSingleClick != null)
             {
                 int diff = Math.Abs(_mouseMoveStartX - e.X);
-                if (_mouseMoveStartX == -1 || _mouseMoveEndX == -1 || diff < 10 && TimeSpan.FromTicks(DateTime.Now.Ticks - _buttonDownTimeTicks).TotalSeconds < 0.25)
+                if (_mouseMoveStartX == -1 || _mouseMoveEndX == -1 || diff < 10 && TimeSpan.FromTicks(DateTime.UtcNow.Ticks - _buttonDownTimeTicks).TotalSeconds < 0.25)
                 {
                     if (ModifierKeys == Keys.Shift && _selectedParagraph != null)
                     {
diff --git a/src/Forms/Main.cs b/src/Forms/Main.cs
index 269c54c44..527fa92bc 100644
--- a/src/Forms/Main.cs
+++ b/src/Forms/Main.cs
@@ -1609,10 +1609,10 @@ namespace Nikse.SubtitleEdit.Forms
             if (_makeHistoryPaused)
                 return;
 
-            if ((DateTime.Now.Ticks - _lastHistoryTicks) > 10000 * 500) // only if last change was longer ago than 500 milliseconds
+            if ((DateTime.UtcNow.Ticks - _lastHistoryTicks) > 10000 * 500) // only if last change was longer ago than 500 milliseconds
             {
                 MakeHistoryForUndo(description);
-                _lastHistoryTicks = DateTime.Now.Ticks;
+                _lastHistoryTicks = DateTime.UtcNow.Ticks;
             }
         }
 
@@ -7106,7 +7106,7 @@ namespace Nikse.SubtitleEdit.Forms
 
         private void TextBoxListViewTextKeyDown(object sender, KeyEventArgs e)
         {
-            _listViewTextTicks = DateTime.Now.Ticks;
+            _listViewTextTicks = DateTime.UtcNow.Ticks;
             if (e.Modifiers == Keys.Shift && e.KeyCode == Keys.ShiftKey)
                 return;
             if (e.Modifiers == Keys.Control && e.KeyCode == (Keys.LButton | Keys.ShiftKey))
@@ -7202,7 +7202,7 @@ namespace Nikse.SubtitleEdit.Forms
             }
 
             // last key down in text
-            _lastTextKeyDownTicks = DateTime.Now.Ticks;
+            _lastTextKeyDownTicks = DateTime.UtcNow.Ticks;
 
             UpdatePositionAndTotalLength(labelTextLineTotal, textBoxListViewText);
         }
@@ -9085,7 +9085,7 @@ namespace Nikse.SubtitleEdit.Forms
             ShowStatus(string.Format("{0}, {1:0}%", statusMessage, _lastProgressPercent));
             statusStrip1.Refresh();
             TaskbarList.SetProgressValue(Handle, percent, 100);
-            if (DateTime.Now.Ticks % 10 == 0)
+            if (DateTime.UtcNow.Ticks % 10 == 0)
             {
                 Application.DoEvents();
             }
@@ -13522,7 +13522,7 @@ namespace Nikse.SubtitleEdit.Forms
             int index = ShowSubtitle();
             if (index != -1 && checkBoxSyncListViewWithVideoWhilePlaying.Checked && oldIndex != index)
             {
-                if ((DateTime.Now.Ticks - _lastTextKeyDownTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
+                if ((DateTime.UtcNow.Ticks - _lastTextKeyDownTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
                 {
                     if (_endSeconds <= 0 || !checkBoxAutoRepeatOn.Checked)
                     {
@@ -17280,7 +17280,7 @@ namespace Nikse.SubtitleEdit.Forms
 
         private void TextBoxListViewTextAlternateKeyDown(object sender, KeyEventArgs e)
         {
-            _listViewAlternateTextTicks = DateTime.Now.Ticks;
+            _listViewAlternateTextTicks = DateTime.UtcNow.Ticks;
             if (_subtitleAlternate == null || _subtitleAlternate.Paragraphs.Count < 1)
                 return;
 
@@ -17352,7 +17352,7 @@ namespace Nikse.SubtitleEdit.Forms
             }
 
             // last key down in text
-            _lastTextKeyDownTicks = DateTime.Now.Ticks;
+            _lastTextKeyDownTicks = DateTime.UtcNow.Ticks;
 
             UpdatePositionAndTotalLength(labelTextAlternateLineTotal, textBoxListViewTextAlternate);
         }
@@ -18237,7 +18237,7 @@ namespace Nikse.SubtitleEdit.Forms
             if (_listViewTextTicks == -1 || !CanFocus || _subtitle == null || _subtitle.Paragraphs.Count == 0 || index < 0 || index >= _subtitle.Paragraphs.Count)
                 return;
 
-            if ((DateTime.Now.Ticks - _listViewTextTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
+            if ((DateTime.UtcNow.Ticks - _listViewTextTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
             {
                 if (index < 0 || index >= _subtitle.Paragraphs.Count)
                     return;
@@ -18304,7 +18304,7 @@ namespace Nikse.SubtitleEdit.Forms
                 if (_listViewAlternateTextTicks == -1 || !CanFocus || _subtitleAlternate == null || _subtitleAlternate.Paragraphs.Count == 0 || index < 0 || index >= _subtitleAlternate.Paragraphs.Count)
                     return;
 
-                if ((DateTime.Now.Ticks - _listViewAlternateTextTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
+                if ((DateTime.UtcNow.Ticks - _listViewAlternateTextTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
                 {
                     var original = Utilities.GetOriginalParagraph(index, _subtitle.Paragraphs[index], _subtitleAlternate.Paragraphs);
                     if (original != null)
@@ -20095,7 +20095,7 @@ namespace Nikse.SubtitleEdit.Forms
         {
             if (Configuration.Settings.VideoControls.WaveformFocusOnMouseEnter && audioVisualizer.WavePeaks != null && !audioVisualizer.Focused && audioVisualizer.CanFocus)
             {
-                if (Math.Abs(_lastWaveformMenuCloseTicks - DateTime.Now.Ticks) > 10000 * 500) // only if last change was longer ago than 500 milliseconds
+                if (Math.Abs(_lastWaveformMenuCloseTicks - DateTime.UtcNow.Ticks) > 10000 * 500) // only if last change was longer ago than 500 milliseconds
                 {
                     audioVisualizer.Focus();
                 }
@@ -20266,7 +20266,7 @@ namespace Nikse.SubtitleEdit.Forms
 
         private void contextMenuStripWaveform_Closing(object sender, ToolStripDropDownClosingEventArgs e)
         {
-            _lastWaveformMenuCloseTicks = DateTime.Now.Ticks;
+            _lastWaveformMenuCloseTicks = DateTime.UtcNow.Ticks;
         }
 
         private void MenuOpened(object sender, EventArgs e)