QUUX-TIME is a library to deal with efficient representation of time. It depends on a bunch of macros and utilities that are currently included in QUUX-TIME but will eventually be published (together with plenty of other ones) in their own package that QUUX-TIME will depend on. The little documentation there is currently lies in the code itself. We don't actually recommend you use QUUX-TIME, though you may freely take code from it to extend your own time library. Instead, we recommend you use LOCAL-TIME.