The Collaborative International Dictionary of English v.0.48:

Working-day \Work"ing-day\, a.
   Pertaining to, or characteristic of, working days, or
   workdays; everyday; hence, plodding; hard-working.
   [1913 Webster]

         O, how full of briers in this working-day world.
                                                  --Shak.
   [1913 Webster]