The deadline to submit proposals for calls in Horizon Cluster 3: Civil Security for Society has been adapted to reflect the delayed start of the programme. The new deadline for most calls is October 23, 2021. The only exception to this are the proposals for the cybersecurity calls, which have to be submitted by October 21, 2021. Thus, applicants have more time to form consortia and prepare their submissions. However, as the exact date of publication for the Cluster 3 calls remains unknown, changes to these deadlines are still possible.