Chronos

• Stable - Useable by all. Bugs are rare.
• MIT - The MIT license is like BSD without the advertising clause. As free as it gets, suitable for cross Smalltalk 100% reuse. The recommended license for Squeak since the 4.0 release.
• Code changes, but only internal - Code has changed but should not affect external behavior.
• Squeak3.6 -
• Class libraries - Class libraries for Squeak to use for development
• Non official package - Just a package for Squeak, no community guarantees. :)
• Squeak3.8 - Released 25 May 2005.
• Squeak3.9 - Released 8 Dec 2006.
• Squeak3.7 - Released 15 Sept 2004.

Added support for the following:

1) Parsing of Scientific Durations (ANSI Smalltalk syntax);
2) Parsing of Calendar/Civil Durations (ISO 8601 syntax--which requires support for fractional element values);
3) Calendar/Civil durations with fractional element values (years, months, days, seconds)--because of #2;
4) Date/Time arithmetic involving fractional elements (years, months, day, hours, minutes, seconds)--because of #3;
5) Added 2007-01-02 as a NYSE closure date (Day Of Mourning for US President Gerald Ford.)
6) Changed some class and category names for compatibility with Monticello.
7) Some other minor improvements.