If my public school MN math is correct 145 days.
Some "Big" meads 17+ ABV 30 days in primary 1.035 to 1.045 OG, 45 in secondary 1.020 SG and 70 days in tertiary "cleaning up" 0.966. Then 2 years in the bottle ageing. At this moment drinking a cranberry orange at 17.4 ABV that was pretty close to that. (Bottled in Feb 2019) and pretty darned good now. Orange didnt come through very well but there is some nice wildflower honey up-front and tart cranberry on the end.