service_id,monday,tuesday,wednesday,thursday,friday,saturday,sunday,start_date,end_date
sun,0,0,0,0,0,0,1,20000101,20991231
f,0,0,0,0,1,0,0,20000101,20991231
sat,0,0,0,0,0,1,0,20000101,20991231
mtwh,1,1,1,1,0,0,0,20000101,20991231
