Geneva
Since 1818, a particular chestnut tree is used as the official "herald of the spring" in Geneva. The sautier (secretary of the Parliament of the Canton of Geneva) observes the tree and notes the day of arrival of the first bud. While this event has no practical impact, the sautier issues a formal press release and the local newspaper will usually mention the news. In 2007, the first bud appeared on 2 March.