CAT stands for Central Africa Time. It is always UTC+2.
CAT itself never changes for daylight saving time – it is UTC+2 all year round.
Where CAT is used
Botswana, Burundi, Malawi, Mozambique, Namibia, Rwanda, South Sudan, Sudan, Zambia, Zimbabwe.
In some of these countries CAT is used only in part of the country or only part of the year.