What is the best year-round, non-periodization training schedule?

If you are running 34 for 10km at 40 maybe you should be giving us your training

Year-round plan for those running 5k to half marathon races

Monday - conversational run

Tuesday - conversational run

Wednesday - tempo workout or steady state run

Thursday - conversational run

Friday - conversational run

Saturday - intervals @ 5 to 10k race pace

Sunday - conversational long run

You could simply replace the Saturday intervals with a race.

If the race is on Sunday then do your long run on Friday or the following Monday or skip it altogether. Also, you could do strides or hill sprints a few days a week if you like.