In the tz distribution, perhaps there could be an addition to README, or some new file, that lists useful Web references for time zones. Here is some possible text: The Web has several other sources for time zone and daylight savings data. Here are some recent links that may be of interest. Date and Time Gateway http://www.bsdi.com/date A text-based source for tables of current time throughout the world. Its point-and-click interface accesses a recent version of the tz data. Local Times Around the World http://www.hilink.com.au/times/ This text-based system contains links to local time servers throughout the world, and though the coverage is limited, the live data provide a nice way to check one's tables. World Time Zones http://tycho.usno.navy.mil/tzones.html US Naval Observatory data, used as the source for `usno1995'. Standard Time Zones of the World http://www.odci.gov/cia/publications/95fact/802389.gif [54 kB] http://www.odci.gov/cia/publications/95fact/802389h.gif [1317 kB] A static time zone map, available in both low-resolution and high-resolution versions. The quality is good, but the map does not indicate summer time, and parts of the data are a few years out of date. VIBE's World Map http://pathfinder.com/vibe/vibeworld An active time zone map. You can point to the map and find out what time it is at that location. The map and data are not as good as other sources.