A full moon appears in the sky over Singapore on May 7, 2020. (Photo by Then Chih Wey/Xinhua)

A full moon appears in the sky over Singapore on May 7, 2020. (Photo by Then Chih Wey/Xinhua)

A full moon is obscured by clouds in the sky over Singapore on May 7, 2020. (Photo by Then Chih Wey/Xinhua)

A full moon appears in the sky over Singapore on May 7, 2020. (Photo by Then Chih Wey/Xinhua)

A full moon appears in the sky over Singapore on May 7, 2020. (Photo by Then Chih Wey/Xinhua)

Photo taken on May 7, 2020 shows a full moon rising over the Larisa Castle in Argos, Greece. (Xinhua/Marios Lolos)