diff --git a/SabreTools.Library/External/Compress/File/File.cs b/SabreTools.Library/External/Compress/File/File.cs
index 82a39660..fabf7a93 100644
--- a/SabreTools.Library/External/Compress/File/File.cs
+++ b/SabreTools.Library/External/Compress/File/File.cs
@@ -195,7 +195,7 @@ namespace Compress.File
             return ZipReturn.ZipGood;
         }
 
-        public ZipReturn ZipFileOpenWriteStream(bool raw, bool trrntzip, string filename, ulong uncompressedSize, ushort compressionMethod, out Stream stream)
+        public ZipReturn ZipFileOpenWriteStream(bool raw, bool trrntzip, string filename, ulong uncompressedSize, ushort compressionMethod, uint? datetime, out Stream stream)
         {
             _inStream.Position = 0;
             stream = _inStream;
diff --git a/SabreTools.Library/External/Compress/SevenZip/SevenZipWrite.cs b/SabreTools.Library/External/Compress/SevenZip/SevenZipWrite.cs
index 8189d239..d8dca46b 100644
--- a/SabreTools.Library/External/Compress/SevenZip/SevenZipWrite.cs
+++ b/SabreTools.Library/External/Compress/SevenZip/SevenZipWrite.cs
@@ -99,7 +99,7 @@ namespace Compress.SevenZip
             // do nothing here for 7zip
         }
 
-        public ZipReturn ZipFileOpenWriteStream(bool raw, bool trrntzip, string filename, ulong uncompressedSize, ushort compressionMethod, out Stream stream)
+        public ZipReturn ZipFileOpenWriteStream(bool raw, bool trrntzip, string filename, ulong uncompressedSize, ushort compressionMethod, uint? datetime, out Stream stream)
         {
             return ZipFileOpenWriteStream(filename, uncompressedSize, out stream);
         }
diff --git a/SabreTools.Library/External/Compress/gZip/gZip.cs b/SabreTools.Library/External/Compress/gZip/gZip.cs
index 9a94f554..6d9a1eba 100644
--- a/SabreTools.Library/External/Compress/gZip/gZip.cs
+++ b/SabreTools.Library/External/Compress/gZip/gZip.cs
@@ -266,7 +266,7 @@ namespace Compress.gZip
 
         public byte[] ExtraData;
 
-        public ZipReturn ZipFileOpenWriteStream(bool raw, bool trrntzip, string filename, ulong unCompressedSize, ushort compressionMethod, out Stream stream)
+        public ZipReturn ZipFileOpenWriteStream(bool raw, bool trrntzip, string filename, ulong unCompressedSize, ushort compressionMethod, uint? datetime, out Stream stream)
         {
             using (BinaryWriter zipBw = new BinaryWriter(_zipFs, Encoding.UTF8, true))
             {
diff --git a/SabreTools.Library/FileTypes/SevenZipArchive.cs b/SabreTools.Library/FileTypes/SevenZipArchive.cs
index 5ff66cac..8c2718c5 100644
--- a/SabreTools.Library/FileTypes/SevenZipArchive.cs
+++ b/SabreTools.Library/FileTypes/SevenZipArchive.cs
@@ -493,11 +493,11 @@ namespace SabreTools.Library.FileTypes
                     if (date && !String.IsNullOrWhiteSpace(rom.Date) && DateTime.TryParse(rom.Date.Replace('\\', '/'), out dt))
                     {
                         uint msDosDateTime = Utilities.ConvertDateTimeToMsDosTimeFormat(dt);
-                        zipFile.ZipFileOpenWriteStream(false, false, rom.Name.Replace('\\', '/'), istreamSize, 0, out writeStream);
+                        zipFile.ZipFileOpenWriteStream(false, false, rom.Name.Replace('\\', '/'), istreamSize, 0, msDosDateTime, out writeStream);
                     }
                     else
                     {
-                        zipFile.ZipFileOpenWriteStream(false, true, rom.Name.Replace('\\', '/'), istreamSize, 0, out writeStream);
+                        zipFile.ZipFileOpenWriteStream(false, true, rom.Name.Replace('\\', '/'), istreamSize, 0, null, out writeStream);
                     }
 
                     // Copy the input stream to the output
@@ -568,11 +568,11 @@ namespace SabreTools.Library.FileTypes
                             if (date && !String.IsNullOrWhiteSpace(rom.Date) && DateTime.TryParse(rom.Date.Replace('\\', '/'), out dt))
                             {
                                 uint msDosDateTime = Utilities.ConvertDateTimeToMsDosTimeFormat(dt);
-                                zipFile.ZipFileOpenWriteStream(false, false, rom.Name.Replace('\\', '/'), istreamSize, 0, out writeStream);
+                                zipFile.ZipFileOpenWriteStream(false, false, rom.Name.Replace('\\', '/'), istreamSize, 0, msDosDateTime, out writeStream);
                             }
                             else
                             {
-                                zipFile.ZipFileOpenWriteStream(false, true, rom.Name.Replace('\\', '/'), istreamSize, 0, out writeStream);
+                                zipFile.ZipFileOpenWriteStream(false, true, rom.Name.Replace('\\', '/'), istreamSize, 0, null, out writeStream);
                             }
 
                             // Copy the input stream to the output
@@ -593,7 +593,7 @@ namespace SabreTools.Library.FileTypes
                         {
                             // Instantiate the streams
                             oldZipFile.ZipFileOpenReadStream(index, out Stream zreadStream, out ulong istreamSize);
-                            zipFile.ZipFileOpenWriteStream(false, true, oldZipFile.Filename(index), istreamSize, 0, out writeStream);
+                            zipFile.ZipFileOpenWriteStream(false, true, oldZipFile.Filename(index), istreamSize, 0, null, out writeStream);
 
                             // Copy the input stream to the output
                             byte[] ibuffer = new byte[_bufferSize];
@@ -718,11 +718,11 @@ namespace SabreTools.Library.FileTypes
                         if (date && !String.IsNullOrWhiteSpace(roms[index].Date) && DateTime.TryParse(roms[index].Date.Replace('\\', '/'), out dt))
                         {
                             uint msDosDateTime = Utilities.ConvertDateTimeToMsDosTimeFormat(dt);
-                            zipFile.ZipFileOpenWriteStream(false, false, roms[index].Name.Replace('\\', '/'), istreamSize, 0, out writeStream);
+                            zipFile.ZipFileOpenWriteStream(false, false, roms[index].Name.Replace('\\', '/'), istreamSize, 0, msDosDateTime, out writeStream);
                         }
                         else
                         {
-                            zipFile.ZipFileOpenWriteStream(false, true, roms[index].Name.Replace('\\', '/'), istreamSize, 0, out writeStream);
+                            zipFile.ZipFileOpenWriteStream(false, true, roms[index].Name.Replace('\\', '/'), istreamSize, 0, null, out writeStream);
                         }
 
                         // Copy the input stream to the output
@@ -801,11 +801,11 @@ namespace SabreTools.Library.FileTypes
                             if (date && !String.IsNullOrWhiteSpace(roms[-index - 1].Date) && DateTime.TryParse(roms[-index - 1].Date.Replace('\\', '/'), out dt))
                             {
                                 uint msDosDateTime = Utilities.ConvertDateTimeToMsDosTimeFormat(dt);
-                                zipFile.ZipFileOpenWriteStream(false, false, roms[-index - 1].Name.Replace('\\', '/'), istreamSize, 0, out writeStream);
+                                zipFile.ZipFileOpenWriteStream(false, false, roms[-index - 1].Name.Replace('\\', '/'), istreamSize, 0, msDosDateTime, out writeStream);
                             }
                             else
                             {
-                                zipFile.ZipFileOpenWriteStream(false, true, roms[-index - 1].Name.Replace('\\', '/'), istreamSize, 0, out writeStream);
+                                zipFile.ZipFileOpenWriteStream(false, true, roms[-index - 1].Name.Replace('\\', '/'), istreamSize, 0, null, out writeStream);
                             }
 
                             // Copy the input stream to the output
@@ -825,7 +825,7 @@ namespace SabreTools.Library.FileTypes
                         {
                             // Instantiate the streams
                             oldZipFile.ZipFileOpenReadStream(index, out Stream zreadStream, out ulong istreamSize);
-                            zipFile.ZipFileOpenWriteStream(false, true, oldZipFile.Filename(index), istreamSize, 0, out writeStream);
+                            zipFile.ZipFileOpenWriteStream(false, true, oldZipFile.Filename(index), istreamSize, 0, null, out writeStream);
 
                             // Copy the input stream to the output
                             byte[] ibuffer = new byte[_bufferSize];