�� �� I see that access to the microsecond clock is called "microsecondClockValue".�� This name is wrong. It derives from millisecondClockValue which was indeed a value. The millisecond clock started from zero on every image startup and wrapped around every 45 days or so.�� The microsecond clock is quite different; it is an absolute clock whose zero is midnight on January 1st 1901, the start of the 20th century (damn those monks). So "Value" should be omitted from the selector.�� In Squeak we provide both Time utcMicrosecondClock and Time localMicrosecondClock which provide the number of microseconds since the start of 1/1/1901 in utc and local time zones respectively.�� It wraps round no sooner than��24/4/20168 (/not/ 2168).�� Time millisecondClockValue is provided for backward compatibility.