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27th October is National Black Cat Day (UK)
(feddit.uk)
Cats Protection UK Website - National Black Cat Day
I include a complementary picture of a black cat in a carrier bag.
Absolutely! The original focus on having a black cat day specifically included black-and-white cats.
"When the campaign was launched, statistics revealed that black and black-and-white cats took, on average, seven days longer to find a home compared to cats of other colours"