The Bat Night has taken place every year since 1997 in more than 30 countries on the last full weekend of August.
Nature conservation agencies and NGOs from across Europe pass on information to the public about the way bats live and their needs with presentations, exhibitions and bat walks, often offering the opportunity to listen to bat sounds with the support of ultrasound technology. The general date is set for the last full weekend in August; however, local organisers sometimes choose other dates if more convenient. For the 20th International Bat Night the date is 27-28 August 2016.
(copy-pasted from another webpage)
Starring this poster: Nigel Blair