Operation "Save the 10 of June"
Here's an article explaining how portuguese politicians managed to turn the 10 of June, an important day in the Estado Novo (Fascist Regime), glorifying "the portuguese race", into an important day for the portuguese nation post-revolution. It's in portuguese, but your browser should be able to translate it. https://www.dn.pt/pol%C3%ADtica/a-operao-salvar-o-10-de-junho-como-o-dia-nacional-sobreviveu-revoluo-e-ao-espetro-do-dia-da-raa