The BiCIKL hackathon will take place at Meise Botanic Garden in Belgium on 20-24 September 2021. During this week of hackathon, the most technical of the BiCIKL community will come together - physically and virtually - to try to hack together the different infrastructures involved in BiCIKL. Several teams will be working on a number of small pilot projects that were chosen to test the existing linkages between infrastructures and to extract novel ones.