3 years, 7 months, and 9 more days
Counting down like that, I imagine you are one of the unfortunate faithful to live in his Archdiocese? I hope you’re wishes (and no doubt prayers) are promptly fulfilled; it’s common for bishops to wait until almost just before their 76th birthdays to officially submit the resignation, and then it can take months or years to name the replacement. However in this case I would imagine the Holy Father is personally involved in making a short list of candidates already.