Edwin, some years ago there was talk of forming a sub-group of this mailing list to tie down the loose ends to make this data register-able. Since all tzcode is derived from public domain, the only copyrightable part of it would be it, as a collective work. I dropped out of that group very early on, due to my interest in marketing my private collection of public domain time zone data on my own. To the best of my Intellectual Property Law knowledge, tzcode is intrinsically in public domain, unless one of its contributors objects. I've been on this list for well over a decade and can't imagine anyone would. Cliff Hancuff In a message dated 4/28/2009 6:01:27 P.M. Eastern Daylight Time, edwin@mavetju.org writes: For all the years I have never worried about this, but today I got an email in my mailbox asking me "Since this is vendor imported data, we would like to register under which license this data is distributed.". Unfortunately I got not much info from Wikipedia, the tzdata or the tzcode files. The tzcode says "This code is in the public domain", but the tzdata doesn't have it, just a "This information is by no means authoritative". So... is there a license under which the tzdata is distributed? Edwin **************Big savings on Dell XPS Laptops and Desktops!(http://pr.atwola.com/promoclk/100126575x1220631276x1201390200/aol?redir=http... click.net%2Fclk%3B214101948%3B35952020%3Bv)