Why is it, that only South Africa gets this day???

That’s right folks, it’s National Cleavage Day in South Africa again.

(the WonderBra spokeswoman) said that the day is intended to be lighthearted amusement, however she claimed that the gross revenue will be donated to the Sunflower Fund, a non-governmental and non-profit organization based in Cape Town with a stated aim to help South African citizens diagnosed with leukemia and other life-threatening blood diseases
- National Cleavage Day at Wikipedia