Hello... At first, thank you for your work. It is very important for us, astrologers. We decided to write you because we made part of an astrological discussion group called Ptolomeo. Some people wrote asking about Argentina timezones few weeks ago and all of the argentine astrologers told that 'Shanks, Elsie data and other english sources have errors'. So, Dra. Amelia Urbina, member of the group, has contacted the Naval Observatory of Buenos Aires and she got the following results. Please see the next images:

From Naval Observatory of Buenos Aires - Argentina:

If you take a look at your data, Argentina have some DST periods from 1975 to 1987, but according to the Naval Observatory official data (and these have a total acceptance by the argentine astrologers), there was no time changes in these years, as shown below: Elsie data from tzdata2001d.tar.gz (with coincidence to Shanks data and his International Atlas): Rule Arg 1974 only - Jan 23 0:00 1:00 S Rule Arg 1974 only - May 1 0:00 0 - Rule Arg 1974 1976 - Oct Sun>=1 0:00 1:00 S Rule Arg 1975 1977 - Apr Sun>=1 0:00 0 - Rule Arg 1985 only - Nov 2 0:00 1:00 S Rule Arg 1986 only - Mar 14 0:00 0 - Rule Arg 1986 1987 - Oct 25 0:00 1:00 S Rule Arg 1987 only - Feb 13 0:00 0 - Rule Arg 1988 only - Feb 7 0:00 0 - Rule Arg 1988 only - Dec 1 0:00 1:00 S However, at the Naval Observatory of Buenos Aires report we have for the same range of time: It's an official document from Argentina Naval Army, and I am quite totally sure those data are 100% trustful... I really hope this info could be useful for your very good job!! Have a nice day! From: Dra. Amelia Urbina draurbina@arnet.com.ar Ptolomeo Mailing List of Astrologers ptolomeo@activanet.es Zodiac - Astrology Software for Windows astrix@zodiacwin.com GuestBook - Opiniones - Opiniões -------------------------------------------------------------------------------- English Support: english@zodiacwin.com Soporte en Español: astrix@zodiacwin.com Suporte em Português: brasil@zodiacwin.com -------------------------------------------------------------------------------- If you want to purchase Zodiac -> Prices, Options and Order Form Si desea Adquirir Zodiac -> Precios, Opciones y Orden de Compra Se deseja adquirir Zodiac -> Preços, Opções e Ordem de Compra -------------------------------------------------------------------------------- Download Demo and/or Last Update Descarga Demo y/o Ultima Actualizacion Download Demo e/ou Atualizaçao Mais Recente -------------------------------------------------------------------------------- Inform me - Informeme - Quero ser Informado -------------------------------------------------------------------------------- No more emails - No recibir mas emails - Não mais receber emails -------------------------------------------------------------------------------- Este mensaje, por soporte internacional, no tiene acentos.