An illuminated Christmas tree is seen in Syntagma Square in Athens, Greece, on Nov. 23, 2021. The festive season kicked off in Athens on Tuesday evening. (Photo: Xinhua)

Illuminated trees with decorative lights are seen in Syntagma Square in Athens, Greece, on Nov. 23, 2021. The festive season kicked off in Athens on Tuesday evening. (Photo: Xinhua)

People take photos of illuminated trees with decorative lights in Syntagma Square in Athens, Greece, on Nov. 23, 2021. The festive season kicked off in Athens on Tuesday evening. (Photo: Xinhua)

A child is seen with decorative lights in Syntagma Square in Athens, Greece, on Nov. 23, 2021. The festive season kicked off in Athens on Tuesday evening. (Photo: Xinhua)