The reason why shops shut on Sundays is mainly because of religion. In a Christian dominated country, Sunday is considered to be a day of rest where everyone should stop work, and, traditionally, go to church. This was the case from the advent of Christianity in Switzerland.

Sundays in Switzerland are governed by the "Sonntagsruhe" (Sunday Rest), a deeply ingrained cultural and legal tradition that prioritizes quiet, family time, and community rest over commercial activity. By law, almost all shops—including supermarkets and retail stores—are closed on Sundays, with the only exceptions being at major train stations and airports. Beyond commerce, there are strict "quiet hour" rules in residential areas; in many cantons, it is technically illegal or at least socially frowned upon to perform loud chores like mowing the lawn, washing your car, or even hanging laundry outside on a Sunday. This creates a uniquely peaceful atmosphere where the entire country effectively "powers down." For the Swiss, Sunday is the day for "Wandern" (hiking) in the mountains, enjoying a long family brunch, or simply resting. For 2026 travelers, this can be a shock; you must ensure you have groceries by Saturday evening. While it may seem restrictive, the Swiss view this as an essential pillar of their high "Quality of Life," ensuring that everyone, regardless of their job, has a guaranteed day to recharge.