Calendar Categories APCO International Charity Conferences Holidays Monthly Meetings Tabletop Training Agenda Agenda Month December 2025 Dec 2025 Collapse All Expand All Dec 25 Thu 2025 Christmas Day @ USA Tickets Dec 25 all-day Christmas celebrates the Nativity of Jesus which according to tradition took place on December 25th 1 BC Information provided by www.officeholidays.com December 2025 Dec 2025