Yes! Poet suggested this fun little diversion last year
At least, it was fun in week 1.
By week 3 the fun was getting a little old, I managed 21 days in the end but some of those were split into 2 runs & also there was at least 1 walk in there masquerading as a run.
It (obviously) gets harder and harder to find the time in the day to do it
IIRC @explorerJC did an advent calendar challenge adding 1km per day through December, and made it to Christmas