Christians go to church on Sundays for a variety of reasons. Some of the main reasons include:

1. Worship: Sunday is often considered the day of worship for Christians, and going to church is seen as an opportunity to come together as a community to praise God and offer prayers.
2. Fellowship: Church is a place where Christians can come together and build relationships with one another. Sunday services provide an opportunity for Christians to connect with each other and support one another in their faith journey.
3. Teaching and instruction: Churches often offer Sunday services that include teaching from the Bible and instruction on how to live a life that is pleasing to God. This helps Christians to grow in their faith and deepen their understanding of God’s Word.
4. Remembrance of the resurrection: For many Christians, Sunday is also seen as a day to celebrate the resurrection of Jesus Christ. This event is seen as the cornerstone of the Christian faith, and attending church on Sunday is a way to remember and celebrate this important event.

These are some of the main reasons why Christians go to church on Sundays. Of course, there may be other reasons as well, and the specific motivations for attending church can vary from person to person and from denomination to denomination.