28 January – In Bucharest, in Victory Square, is held a meeting organized by PNȚCD, PNL, PSDR and other parties protesting against the decision of the FSN to participate in elections. In parallel, is conducted a counter-manifestation organized by FSN and supported by workers at IMGB, ICTB, IMMR and IIRUC.
29 January – January 1990 Mineriad: Over 5,000 miners from the Jiu Valley arrive in the capital following calls launched in the media by President Ion Iliescu.
February
2 February
The Romanian Society for Philosophy is reestablished.
Bucharest Military Court pronounces judgment in the trial of four of Ceaușescu's close collaborators – Manea Mănescu, Tudor Postelnicu, Emil Bobu, and Ion Dincă: life imprisonment and total confiscation of personal property.
6 May – More than 1,200,000 people form a human chain along the Prut River, on a length of 700 km (430 mi). For six hours, Romanians were allowed to cross the Prut River in the Moldavian SSR without passports and visas.
24 May – The Masca Theatre is founded by actor Mihai Mălaimare [ro].
June
13 June – June 1990 Mineriad: Six people are shot dead and 746 injured after law enforcers, supported by miners, intervened in force against protesters in University Square and the civilian population.
15 November – A large-scale demonstration on the occasion of three years from the anticommunist uprising of workers and residents of Brașov is held in the city. Led by members of the Association "15 November", demonstrators go through the old route of the demonstration in 1987.