Strava automatically keeps a tally of your years total, and makes you a nice little video at the end of year 
Strava will also add up all the bits of miles so you’ll gain a few over the year, tactical thinking going on 
I did just over 5 this morning, early morning frosty headtorch run with my friend and the dog. It was lovely to be out early on a holiday as the roads were so quiet, didn’t meet a single car.
So that’s 8 miles done so far