Normalize the default date format to the format Discord uses for the US client

DiscordChatExporter.Cli/Commands/Base/ExportCommandBase.cs

@@ -90,7 +90,7 @@ public abstract class ExportCommandBase : TokenCommandBase
         "dateformat",
         Description = "Format used when writing dates."
     )]
-    public string DateFormat { get; init; } = "dd-MMM-yy hh:mm tt";
+    public string DateFormat { get; init; } = "MM/dd/yyyy h:mm tt";
 
     [CommandOption(
         "fuck-russia",

DiscordChatExporter.Gui/Services/SettingsService.cs

@@ -15,7 +15,7 @@ public partial class SettingsService : SettingsManager
 
     public bool IsTokenPersisted { get; set; } = true;
 
-    public string DateFormat { get; set; } = "dd-MMM-yy hh:mm tt";
+    public string DateFormat { get; set; } = "MM/dd/yyyy h:mm tt";
 
     public int ParallelLimit { get; set; } = 1;