Alarms and behaviour guidelines
4. Alarm tests
Every first Wednesday in February, a siren test is carried out throughout Switzerland to check the proper functioning of the installations and to inform the population of the appropriate behaviour to adopt in the event of an alarm.
The next test will happen on Wednesday, February 5, 2025 at 1:30 pm.
Depending on technical requirements, additional tests may be organised at other times. In all cases, the population is informed in advance.