software to calculate the dates of save daylight

[Jason7899]

hi,
any one know a software to list the dates of the next
changes of the daylight for example:
in next 24-10-2009 the hour will change for less hour
thanks for your help
:)

[acoder]

Windows works this out automatically. What would be the purpose of this software?

[Jason7899]

hi,
i know that windows does that but i need know when the hour changes at least one week before.
The reason is that i admin of some devices that have internal clock and when the hour changes that devices simple don´t change and save records
with wrong hour and them i need change manually.the data/info that was recorded.
thanks for your help

[acoder]

It may help if you specify the country. Different countries have different rules and dates.

[Jason7899]

hi,
i want know for Portugal
thanks for your help
:)

[acoder]

I know this might not be quite what you're after, but why not simply use a simple calendar notification and set dates/notes using the dates/times from something like this.