Chris Muller uploaded a new version of Chronology-Core to project The Inbox:
http://source.squeak.org/inbox/Chronology-Core-cmm.55.mcz

==================== Summary ====================

Name: Chronology-Core-cmm.55
Author: cmm
Time: 30 April 2020, 10:48:47.354398 pm
UUID: e6198a24-7c07-4981-82a8-a3d33b9ca1cd
Ancestors: Chronology-Core-cmm.54

Fixed comment.

=============== Diff against Chronology-Core-cmm.54 ===============

Item was changed:
  ----- Method: Time class>>utcMicrosecondClock (in category 'clock') -----
  utcMicrosecondClock
+ 	"Answer the UTC microseconds since the POSIX epoch (1/1/1970 @ 00:00:00)."
- 	"Answer the UTC microseconds since the Smalltalk epoch (January 1st 1901, the start of the 20th century).
- 	 The value is derived from the Posix epoch with a constant offset corresponding to elapsed microseconds
- 	 between the two epochs according to RFC 868."
  	^ self primUtcMicrosecondClock - (DateAndTime daysFromSmalltalkEpochToPosixEpoch*MicrosecondsInDay)!