The DST does not save energy (at least in Brazil). It was abolished based on a lot of studies that showed that (and that it brought quite a lot of harm), and the talks about reestablishing it because of energy saving are nothing but stupid.
Oh, and both ANEEL and the ONS already made quite public and definitive statements that DST won't save any energy this year.
It affects business with other South American countries.
International trade exerts outsized influence on politics, just because of the greater overlap between the international trade class and the national political class.
From the countries in a temperate zone that have the same timezone as the main Brazilian one only Paraguay has DST. Losing sync with Argentina and Uruguay is quite a high price to play to keep sync with Paraguay.
For every other country, our DST is just some weirdness that they have to adapt to for no reason.
Thanks, I thought Argentina was less enlightened than they are. It is odd that Paraguay does it, because the "reduce energy" myth means little there: they export surplus hydro power.
Oh, and both ANEEL and the ONS already made quite public and definitive statements that DST won't save any energy this year.
I wonder who is making pressure for it.