All of Argentina will turn clocks one hour ahead at the start of December 30, 2007. The clocks will be turned back one hour when March 16, 2008 is about to start.
Why daylight saving time will be used
Daylight Saving Time will be observed in order to save energy. It is likely to be used next year as well, from October to March.
The official law is available in Spanish on the Senate web site - EXPEDIENTE NUMERO 599/07.
Dates of daylight saving time 1988–2008
These are the dates Daylight Saving Time started and ended in Buenos Aires, Argentina since 1988. Note that some states of Argentina have made other time zone changes to their clocks that are not shown in the list below.