Respondi o topico aberto em ingles a pouco de como mudar o timezone.

https://forum.recalbox.com/topic/3602/how-to-change-time-zone

é bem simples, porem o timezone não é setado no recalbox.conf.

timezone is not set in recalbox.conf. I found a way to set to Brazil.

1 - Remount your / filesystem to read-write

mount -o remount,rw /

2 - Unkink the /etc/localtime since it is set to Europe/Paris

unlink /etc/localtime

3 - create new symbolic link to Brazil/Sao_Paulo
ln -s /usr/share/zoneinfo/America/Sao_Paulo localtime

And finally type date to see your new timezone

date

Thu Sep 15 17:27:03 BRT 2016

Hope this helps.