Do not miss anything. All events at a glance. Dates & Events. 11.01.2021 - 16.01.2021 BAU Messe Please note that the BAU will take place digitally. More info. 22.03.2021 - 26.03.2021 ISH Messe 2021. Please note that ISH 2021 will take place digitally. We will provide you with more information on this shortly. More info.