Federal Fast Monday (Jeûne fédéral) in Switzerland is a day of public prayer and fasting. It is observed by the Swiss Reformed Church and takes place on the third Sunday in September, with the following Monday being a public holiday in some cantons.

History:

The tradition dates back to the 15th century but took on a federal character after the Swiss Reformation. It was established by the Federal Diet in 1832 to commemorate crises or events such as wars or epidemics, fostering a sense of unity and reflection among Swiss citizens.

Traditions:

• Church Services: Special church services are held where people can gather for prayer and reflection.
• Fasting: Some individuals observe fasting, abstaining from food as a form of spiritual cleansing and solidarity.
• Charitable Acts: People are encouraged to perform acts of charity, reflecting on their blessings and supporting those in need.

Activities on the Day:

While not all cantons recognize Federal Fast Monday as a public holiday, those that do may have various local customs. In Vaud, for instance, people traditionally enjoy plum tart (tarte aux pruneaux) to break their fast. Generally, it's a quiet day with time spent with family or in contemplation. Businesses might be closed or have limited hours in areas where it's observed as a public holiday.