What is the ruling on a fiancée traveling to another governorate on Sham El-Nessim day without her fiancé's permission?

The fiancée is a stranger to her fiancé, so the engagement does not entail marital rulings. Therefore, she is not obliged to seek his permission when going out; rather, her obedience is to her father. Moreover, going out to participate in Sham El-Nessim is not permissible for the fiancée or anyone else, because it is one of the holidays of the people of falsehood.