Sometimes it pays to read the changelog

From this morning’s updates on ubuntu.

Version 2009n-0ubuntu0.9.04.1:

  * Add argentinas-dst-2009.diff: Disable DST switch for Argentina tomorrow,
    as the Argentina government decided yesterday. Careful planning is boring.
    Thanks to Margarita Manterola for the patch! (LP: #453165)

I find timezones fascinating, especially how much they get messed with for no particularly justifiable reason.