December 24 ...
I left work early (so did everyone else) and took the opportunity to walk up to the library to drop off a book, then I walked to a fresh fruit and veg market where I picked up some veggies for Christmas, and then I walked home.
I have been thinking about the possibility of walking home from work for a while ... and it would take me about an hour, but it can be done without too much difficulty.
The whole walk on Christmas Eve was 6 km. If I just walked home from work without the trip to the library and trip to the market, it would be about 4 km.