Hi Girogio,
first of all the Region of Caprivi is not having daylight-saving time as the rest of Namibia, so they are always the same time as South Africa or Botswana. The rest of Namibia is changing on 1 April and back on 2 September. In-between Namibia is one hour behind Botswana and South Africa. Consequently, if you travel from Namibia to Botswana in August you win one hour (13:00 Botswana is 12:00 Namibia).
But why worry... there are clocks of the times at the Namibian and the Botswana border poast.
Cheers
Christian
P.S. This site might help you:
http://weltzeituhr.com/laender/e_afrika.shtmlVom 23. August bis 6. September, 10. Oktober bis 18. Oktober 2026, 5. Dezember 2026 bis 17. Januar 2027 und 1. bis 30. Mai 2027 nicht/kaum im Forum aktiv!