Gary Grant, owner of The Entertainer toy shop, and spokesman for DreamToys told Premier he won't let the busyness of Christmas change his stance on marking the Sabbath.
Speaking during News Hour he said: "As a Christian, I believe in families - I have my own children, I have six grandchildren.
Being able to have one day that we can meet together, we can eat together and stay together as a family, I think is very important."
Mr Grant said it wasn't an easy decision to make to put God before his profits.
He added: "I wrestled with this concept of Sundays - one of the Ten Commandments - keep the Sabbath holy.
"I really felt the Lord was saying to me, 'Gary, just be closed on a Sunday."
However, he highlighted the fact that preparing for Christmas in November isn't greedy as businesses are simply being practical doing so.
He said: "To move the amount of volume that has to be moved through warehouse, trucks, into the back doors of stores and onto the shelves and through the front door in the amount of time that's available, it's already a challenge."
Meanwhile, the annual DreamToys list compiled on behalf of the Toy Retailers Association has been released.
Mr Grant told Premier that it took between six and eight hours for the team of 12 retailers he was a part of to decide on the list.
While the 1970s gel-filled Stretch Armstrong action figure has returned to the list with a modest price tag attached, an animatronic roaring tiger was on Wednesday revealed as one of this year's most sought after Christmas toys with a £134.99 price tag.
Other entries include the Hatchimals Surprise, which is an update on last year's hit Christmas toy priced at £74.99, and Toilet Trouble, the £17.99 kid's game that asks: "Which flush will cause the gush?"
Listen to Gary Grant speaking with Premier's Alex Williams:
