Sets the default time specification for use by fromString() when no time zone or UTC offset is found in the string being parsed, or when "-0000" is found in an RFC 2822 string. By default, fromString() returns a local clock time (type ClockTime) when no definite zone or UTC offset is found. You can use this method to make it return the local time zone, UTC, or whatever you wish. name="spec" the new default time specification