I don't just wash windows so have no problem working when it's convenient for the customer including weekends.
Most of my larger external house cleaning jobs including gutter clearing, gutter, fascias, soffit cleaning, conservatory deep cleans (inc roofs), patio, decking & driveway cleaning are mostly done on Saturdays & Sundays as customer prefer to be home when the works are carried out.
Customers are happy and I get paid on the day…Simples!