The occasion was used to call for an end to the conflict and to ensure the safety of aid workers across the world.
Volunteers in Glasgow gathered at The People's Palace and held pictures of 22 aid workers who have died since war broke out in Syria.
British Red Cross chief executive Sir Nick Young said: "Today we are standing in solidarity with our friends and colleagues in the Syrian Arab Red Crescent to say enough is enough.
"Across Syria, volunteers are risking their lives to bring vital aid to people in desperate need.
"Intentional targeting of aid workers, who play no part in the conflict and who simply seek to help those most in need, is unacceptable.
"This must stop."