It seems you’re asking about — most likely a misspelling or phonetic rendering of the Portuguese phrase "Dia Mesquita Nua" (literally "Naked Mesquita Day").
If so, you are referring to a that has taken place in Lisbon, Portugal , involving the Mesquita Central de Lisboa (Lisbon Central Mosque). day mesquita nua
Otherwise, is a rare, art-driven open-mosque event last held around 2018 in Lisbon, and your best bet is to monitor Lisbon’s cultural and Islamic community channels for a possible revival. It seems you’re asking about — most likely