This letter addresses the change of date for the 15th Anniversary Security Council Open Debate on Women, Peace, and Security, originally scheduled for 22 October 2015, and rescheduled to 13 October 2015. Civil society groups express concerns over the lack of consultation and its impact on women’s participation, civil society engagement, and the overall effectiveness of the debate. The letter calls for support to ensure civil society inclusion, compensation for financial losses, and expediting visa processes for participants.