diff --git a/src/NSExt/DateTimeExtensions.cs b/src/NSExt/DateTimeExtensions.cs
index edef15f..2d25d42 100644
--- a/src/NSExt/DateTimeExtensions.cs
+++ b/src/NSExt/DateTimeExtensions.cs
@@ -52,30 +52,43 @@ public static class DateTimeExtensions
     // ReSharper disable once InconsistentNaming
     public static string yyyyMM(this DateTime me)
     {
-        return me.ToString("yyyy-MM");
+        return me.ToString("yyyyMM");
     }
 
     // ReSharper disable once InconsistentNaming
     public static string yyyyMMdd(this DateTime me)
+    {
+        return me.ToString("yyyyMMdd");
+    }
+
+
+    // ReSharper disable once InconsistentNaming
+    public static string yyyy_MM(this DateTime me)
+    {
+        return me.ToString("yyyy-MM");
+    }
+
+    // ReSharper disable once InconsistentNaming
+    public static string yyyy_MM_dd(this DateTime me)
     {
         return me.ToString("yyyy-MM-dd");
     }
 
     // ReSharper disable once InconsistentNaming
-    public static string yyyyMMddHHmm(this DateTime me)
+    public static string yyyy_MM_dd_HH_mm(this DateTime me)
     {
         return me.ToString("yyyy-MM-dd HH:mm");
     }
 
 
     // ReSharper disable once InconsistentNaming
-    public static string yyyyMMddHHmmss(this DateTime me)
+    public static string yyyy_MM_dd_HH_mm_ss(this DateTime me)
     {
         return me.ToString("yyyy-MM-dd HH:mm:ss");
     }
 
     // ReSharper disable once InconsistentNaming
-    public static string yyyyMMddHHmmssfff(this DateTime me)
+    public static string yyyy_MM_dd_HH_mm_ss_fff(this DateTime me)
     {
         return me.ToString("yyyy-MM-dd HH:mm:ss.fff");
     }