For personal goods in tourist traffic, the largest border crossings are open 24 hours a day, Monday through Sunday, and are staffed by border guards. Special opening hours apply at airports. Numerous small border crossings, however, are open only at certain times, while some are no longer manned at all.

Entry requirements for Switzerland
Border controls at Switzerland's borders with the Schengen countries were lifted on 15 June 2020, and full freedom of movement for persons with all EU/EFTA countries and the United Kingdom applies again.
Tourist traffic
The detailed opening hours are available in the Border crossings and customs offices, opening hours.
Outside of the clearance hours, you can use the declaration box to declare your personal goods in writing. Information can be found at the following link: Declaration boxes.
Please take note of the Road Traffic Act (e.g. ban on Sunday driving): SR 741.01 RTA.
Foreign customs administrations
We are not able to provide you with any information on foreign regulations. Please direct your query to the foreign customs authority.