Waving flags, beating drums, dancing and chanting, crowds marched on the streets of Khartoum despite a heavy deployment of security forces - who later fired tear gas canisters to break them up.
Comment: The US' recent willingness to normalise relations with Sudan turns a blind eye to the country's well-documented human rights abuses, writes Jehanne Henry.
The US is looking to make a timely diplomatic breakthrough with Sudan, as the Arab state seeks to be removed from America's blacklist of state sponsors of terrorism.
Sudanese Prime Minister Abdalla Hamdok has said that keeping his country on a US blacklist of state sponsors of terrorism is endangering its path towards democracy.
Comment: In reality, it is Hemedti, the brutal and cunning general who organised the harsh crackdown in Khartoum last June, who wields the real power in Sudan, writes Gerard Prunier.
Comment: Hemedti could become a Frankenstein's monster, annihilating any hope of a new Sudan, and turning against those who enabled his rise, writes Sarra Majdoub.
The US nominated veteran diplomat Donald Booth as a special envoy to Sudan to help craft a 'peaceful political solution' between the military rulers and groups seeking civilian rule.