All our shipments are done via USPS Priority. The transit times are 2-3days with 90% of shipments taking 2 days.
If we ship your product on Friday it will get to the destination post office Sunday morning and sit in unknown conditions all day Sunday until it is delivered Monday.
If we ship your product Saturday it will usually arrive at the destination post office Monday morning and be delivered that day.
So wether we ship Friday or Saturday it is likely your package will arrive Monday while spending the least amount of time in transit.