English: World map showing zones as in tz database, version 2012c along with the rough guide lines for timezone areas from the CIA World Map.

Created from the public domain tz_world_mp shapefile, version 2012-10-08 as found at http://efele.net/maps/tz/world/

Timezone guide lines data from the public domain ne_10m_time_zones shapefile, version 2.0.0 published by Natural Earth at http://www.naturalearthdata.com/downloads/10m-cultural-vectors/timezones/

Created with the help of kbh3rd's shptosvg.pl utility and w:Inkscape. https://github.com/kbh3rd/shptosvg/wiki

shptosvg.pl -x 2048 -y 1024 -p1 -d0.5 -T "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs" tz_world_mp,srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs",group=TZID,same=TZID ne_10m_time_zones,srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs",group=iso_8601

This SVG file also contains a legend, but it is outside of the page boundaries in this version. See Tz world mp-color+legend.svg:  for a version with the page boundaries set to show the legend.