You could try to get your workplace to switch to flex time schedule or something like 9-80 schedule. I work 9-80 which means in a two week payperiod we work eight 9-hour days (on mon-thurs), one 8-hour day (friday), and then that's 80 hours so the second friday is off! The office is split into two groups so that half the people are there on each friday. Because of this I have a weekday to take care of errands that are best done on weekdays.