diff --git a/src/libraries/System.Private.CoreLib/src/System/Globalization/DateTimeFormatInfo.cs b/src/libraries/System.Private.CoreLib/src/System/Globalization/DateTimeFormatInfo.cs
index c91e7fa5c1435..a7b603ef859cb 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Globalization/DateTimeFormatInfo.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Globalization/DateTimeFormatInfo.cs
@@ -2409,7 +2409,7 @@ internal bool Tokenize(TokenType TokenMask, out TokenType tokenType, out int tok
             if (isLetter)
             {
                 ch = Culture.TextInfo.ToLower(ch);
-                if (IsHebrewChar(ch) && TokenMask == TokenType.RegularTokenMask)
+                if (!GlobalizationMode.Invariant && IsHebrewChar(ch) && TokenMask == TokenType.RegularTokenMask)
                 {
                     if (TryParseHebrewNumber(ref str, out bool badFormat, out tokenValue))
                     {
diff --git a/src/libraries/System.Private.CoreLib/src/System/Globalization/DateTimeParse.cs b/src/libraries/System.Private.CoreLib/src/System/Globalization/DateTimeParse.cs
index e4b260885f825..ce6e23b8c8560 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Globalization/DateTimeParse.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Globalization/DateTimeParse.cs
@@ -1050,6 +1050,12 @@ private static bool Lex(DS dps, ref __DTString str, ref DateTimeToken dtok, ref
                     }
                     break;
                 case TokenType.JapaneseEraToken:
+                    if (GlobalizationMode.Invariant)
+                    {
+                        Debug.Fail("Should never be reached");
+                        return false;
+                    }
+
                     // Special case for Japanese.  We allow Japanese era name to be used even if the calendar is not Japanese Calendar.
                     result.calendar = JapaneseCalendar.GetDefaultInstance();
                     dtfi = DateTimeFormatInfo.GetJapaneseCalendarDTFI();
@@ -1066,6 +1072,12 @@ private static bool Lex(DS dps, ref __DTString str, ref DateTimeToken dtok, ref
                     }
                     break;
                 case TokenType.TEraToken:
+                    if (GlobalizationMode.Invariant)
+                    {
+                        Debug.Fail("Should never be reached");
+                        return false;
+                    }
+
                     result.calendar = TaiwanCalendar.GetDefaultInstance();
                     dtfi = DateTimeFormatInfo.GetTaiwanCalendarDTFI();
                     if (result.era != -1)