Denmark is set to witness a significant change in its monarchy as Queen Margrethe II, who has dutifully served for 52 years, will abdicate the throne on Sunday. Margrethe, 83, will be succeeded by her eldest son Crown Prince Frederik, 55, marking the first voluntary abdication in almost nine centuries. The formal abdication ceremony is scheduled to take place at 2 pm (1300 GMT) in Copenhagen. The long-serving monarch will sign a declaration of abdication during a meeting with the government. Following the abdication, at 3 pm (1400 GMT), Prime Minister Mette Frederiksen will officially proclaim…