susie g.:
I don’t let my children participate in sports that require them to practice or have games on Sundays. I try to make it a day of rest where the family members are pretty much home. … Here’s my question: Is it mortal sin for me to ignore the 3rd commandment? Am I ignoring it by going out on Sunday? We absolutely never miss mass.
You aren’t ignoring the third commandment by going out on Sundays as long as you are keeping in mind what the third commandment says. Here is some info from the Catechism, which actually mentions sports and restaurants as ok, as long as you take some things in consideration:
2185 **On Sundays and other holy days of obligation, the faithful are to refrain from engaging in work or activities that hinder the worship owed to God, the joy proper to the Lord’s Day, the performance of the works of mercy, and the appropriate relaxation of mind and body. ** 123 Family needs or important social service can legitimately excuse from the obligation of Sunday rest. The faithful should see to it that legitimate excuses do not lead to habits prejudicial to religion, family life, and health.
The charity of truth seeks holy leisure- the necessity of charity accepts just work. 124
2186 Those Christians who have leisure should be mindful of their brethren who have the same needs and the same rights, yet cannot rest from work because of poverty and misery. Sunday is traditionally consecrated by Christian piety to good works and humble service of the sick, the infirm, and the elderly. Christians will also sanctify Sunday by devoting time and care to their families and relatives, often difficult to do on other days of the week. Sunday is a time for reflection, silence, cultivation of the mind, and meditation which furthers the growth of the Christian interior life.
2187 Sanctifying Sundays and holy days requires a common effort. Every Christian should avoid making unnecessary demands on others that would hinder them from observing the Lord’s Day.
Traditional activities (sport, restaurants, etc.), and social necessities (public services, etc.), require some people to work on Sundays, but everyone should still take care to set aside sufficient time for leisure. With temperance and charity the faithful will see to it that they avoid the excesses and violence sometimes associated with popular leisure activities. **In spite of economic constraints, public authorities should ensure citizens a time intended for rest and divine worship. ** Employers have a similar obligation toward their employees.
For me neither.
I’m not in school right now and my job is mostly evenings. Which also means I usually work Sunday evenings. 
) but I’ve been brought up to think that making other people work on Sundays is wrong.