On Friday, President Ali Abdullah Saleh said in a speech that the mingling of men and women at "Change Square," where daily anti-government protests take place in the capital, was against Islamic law.
On Saturday, demonstrators countered that his comments were an insult to women and the people of Yemen as a whole.
Thousands of women marched in Sanaa and several other cities to denounce the comments.
The revolutionary youth who have been behind the two months of anti-government protests in this impoverished country, urged the people to come out to the streets in millions on Sunday for a day of "honor and dignity."
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