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1 Introduction

The local-time library is a Common Lisp library for the manipulation of dates, times and intervals. It was originally based almost entirely upon Erik Naggum's paper The Long Painful History of Time [NaggumPaper]. Many of the core concepts originated from this paper, such as the seperation of days and seconds, the choice of 2000-03-01 as the standard epoch, and the timestring format.

Caveats: This implementation assumes that time zone information is stored in the tzfile format. The default timezone is loaded from /etc/localtime. On non-POSIX systems, this will certainly give different results than the system time handling.