The Early Church usually met on the first day of the week (Sunday – Resurrection day). Acts 20 tells us it was the day they gathered together to fellowship and break bread. When Paul wrote the Corinthians he also referred to Sunday as they day when they gathered together (1 Cor.16).
People may ask you, “What day of the week should we worship the Lord?” I would encourage you to take them to Romans 14 where Paul writes, “One person esteems one day above another; another person esteems every day alike”. A Born Again Believer will consider ‘every day alike’. To the Christian every day is the Lord’s Day. We worship Jesus Christ every day of the week.