David T. Lewis uploaded a new version of Chronology-Core to project The Trunk:
http://source.squeak.org/trunk/Chronology-Core-dtl.64.mcz

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

Name: Chronology-Core-dtl.64
Author: dtl
Time: 2 December 2020, 9:43:40.709057 pm
UUID: b3804941-fd01-4700-a64b-b00c42165675
Ancestors: Chronology-Core-eem.63

Deprecate #totalSeconds and #millisecondClockValue in DateAndTime and refer senders to the canonical implementations in Time.

=============== Diff against Chronology-Core-eem.63 ===============

Item was removed:
- ----- Method: DateAndTime class>>millisecondClockValue (in category 'smalltalk-80') -----
- millisecondClockValue
- 
- 	^ self clock millisecondClockValue!

Item was removed:
- ----- Method: DateAndTime class>>totalSeconds (in category 'smalltalk-80') -----
- totalSeconds
- 
- 	^ self clock totalSeconds!