05 February, 1891
It will come soon enough, especially this half the year. Professors start cracking down about exams and week now. Then you'll have your fittings soon for your dress if you didn't already. Even if you don't debut, I assume you'll still go. As far as finishing school, it will be beneficial and I hear Cousin Evelyn does take the girls to events occasionally. You'll have that to look forward to. And I highly doubt Evelyn allows you to interact with the muggles.