Using a Black Friday discount after having used a Student.

Hi! I wanted to know, since my student plan for Proton Unlimited is ending tomorrow, if my best option is renewing for two years, thus saving 120€ at “standard” price, or instead waiting until the black friday, subscribing monthly until then and saving using that discount. Am I allowed to use a Black Friday discount after having used a Student (as I understand I just can’t renew a Student Discount)?. Finally, are there other options which i haven’t considered at all? Thank you in advance!