Chronos

• Alan Lovejoy (chronos)

• Squeak - The official distribution of Squeak.
• Non official package - Just a package for Squeak, no community guarantees. :)
• Class libraries - Class libraries for Squeak to use for development
• Rock solid - Useable and hasn't had bugs for a long time.
• Only extensions, no changes - Code extensions but no changes in existing code.
• 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.
• Squeak3.7 - Released 15 Sept 2004.
• Squeak3.9 - Released 8 Dec 2006.
• Squeak3.8 - Released 25 May 2005.

Chronos is an industrial strength Date/Time library:

* Implements the ANSI-Smalltalk Standard DateAndTime, DateAndTimeFactory, Duration and DurationFactory protocols.
* Supports the full functionality of the Olson Timezone Database (the native time zone database of UNIX)--including time zone rules that vary from year to year.
* Supports various calendrical systems in addition to the international standard Gregorian calendar (e.g., Julian, Hebrew, Islamic, Persian...).
* Supports both business and scientific use cases, including time-of-day-preserving date arithmetic, holiday definition/detection, and resolution down to the nanosecond.
* Supports point-in-time values that are either invariant to universal time or invariant to nominal time.
* And much, much more...

SqeakSource: http://www.squeaksource.com/Chronos.html
Home: http://www.chronos-st.org/
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THE CHRONOS TIME ZONE REPOSITORY:

Chronos requires the Chronos Time Zone Repository for full functionality. It can be downloaded from the following link: http://www.chronos-st.org/downloads/time-zones.zip
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SQUEAKMAP PACKAGE LOADER ERROR:

The SqueakMapPackageLoader tool does not work with the Chronos.sar archive, although Chronos.sar can be dowloaded to your local machine over HTTP and then installed using the Squeak FileList. (This problem has been reported, and a fix has been identified. See the article named "[SM][BUG] Error: can't find EOCD position" at the URL "http://lists.squeakfoundation.org/pipermail/squeak-dev/2006-October/109758.html".)
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INSTALLATION INSTRUCTIONS: http://www.chronos-st.org/Installation.html
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RE-INSTALLATION:

When using file-ins (.st files or .sar files,) it is always necessary to completely remove the previous version of Chronos, before installing a different version. The "deltas" between versions are not distributed--the Chronos file-ins for each version all assume a "de novo" installation.
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For more details, visit the Chronos Web Site at http://www.chronos-st.org.

Releases

• 1-B1.172 - Very stable release--this is the same version as the initial Dolphin release.
• 2-B1.173 - Fixed bug in ChronosParser; Fixed name conflict with Seaside (HttpRequest => PPHttpRequest)
• 3-B1.174 - Corrected list of dates on which the NYSE was closed, based on more authoritative information
• 4-B1.184 - Adds support for parsing durations.
• 5-B1.186 - Unifies time-interval API/semantics between Timeperiods and CalendricalCoordinates
• 6-B1.188 - Deeper uinification of time-interval API/semantics between Timeperiods and CalendricalCoordinates
• 7-B1.190 - Adds support for infinities, infinitesimals, NaNs, infinite durations, the infinite past and the infinite future
• 8-B1.196 - Improved support for parsing IS0 8601, and for printing Timeperiods. Some bug fixes.