The value of this constant is 12/31/9999 11:59:59 PM +00:00.

The DateTimeOffset.MaxValue property is used to determine whether the value of a new DateTimeOffset object or the DateTimeOffset value returned by an arithmetic operation is the same as or earlier than this maximum range value. If it is not, the method throws an ArgumentOutOfRangeException. Any DateTimeOffset value is converted to Coordinated Universal Time (UTC) before the method compares it with DateTimeOffset.MaxValue. This means that a DateTimeOffset value whose date and time are close to the maximum range, but whose offset is negative, may throw an exception. For example, the value 12/31/9999 11:00 PM -02:00 is out of range because it is one hour later than DateTimeOffset.MaxValue when it is converted to UTC.

Some calendars, such as the System.Globalization.UmAlQuraCalendar, support an upper date range that is earlier than DateTime.MaxValue. In these cases, trying to access DateTime.MaxValue in variable assignments or formatting and parsing operations can throw an ArgumentOutOfRangeException. Instead of retrieving the value of DateTime.MaxValue, you can retrieve the value of the specified culture's latest valid date value from the System.Globalization.Calendar.MaxSupportedDateTime property.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 2.0.0.0, 4.0.0.0