During the energy crisis of 2022, a federal energy-saving ordinance applied for six months from 1 September. Its full name is Verordnung zur Sicherung der Energieversorgung über kurzfristig wirksame Maßnahmen. Illuminated advertising had to be switched off from 10 p.m. until 4 p.m. the next day. Shops had to keep their doors closed when an open door let heat escape. In offices, 19 degrees became permissible instead of 20.