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Created by divanov on: Thu, 25 Jun 2009 10:19:29 GMT, Last modification: Mon, 30 Apr 2012 12:07:45 GMT

Common Lisp library for representing and handling time zones, dates, and timestamps. This package partially supports ISO 8601 format and provides localized read and print of date and time.

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Version1.2.013 - Tuesday, 13 September 2011
OS compatibilityWindow, *nix
ASDF installableNo
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The idea was originally based on the LOCAL-TIME concept proposed by Erik Naggum (1965-2009) in "The Long, Painful History of Time" in 1999.

The implementation was also inspired by the Local-Time package by onShore, Inc. available from (seems not available any longer).

But Erik had criticized their open source implementation heavily. For example, bignum-based operations were defeating the original efficiency purpose of the LOCAL-TIME.

Taking the critique into account and after realizing drawbacks, the fundamentals were redesigned in Ystok-Local-Time and code was rewritten considerably.

Date/time is represented by one of the following three structures:

Compatible Implementations


Required Libraries  View graph


Authors and Maintainers

Dmitriy Ivanov




Time | ISO 8601 | Libraries | Windows family | Unix family | LLGPL

See Also

YstokSQL | YstokGrid

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