Dressed in formal graduation gowns, many of the students defied masks ban chanted as they walked from a metro station to the ceremony venue, calling for the government to respond to protesters' demands that include universal suffrage.
An unnamed graduate student said the movement was to draw attention from the society and to show the frontliners that 'they are not alone'.
The protests started over a now-scrapped extradition bill that would have allowed people to be sent to mainland China for trial but have evolved into calls for greater democracy and an independent inquiry into complaints of excessive force by police, among other demands.
The months of sometimes violent anti-government protests have plunged the former British colony into its biggest crisis in decades, with no sign the demonstrators plan to give up.
At the root of many protesters' indignation is what they see as Chinese meddling with Hong Kong's promised freedoms.