A glyph representing a day called "7 Deer" on mural fragments dating from the third century BC found inside the ruins of a pyramid in Guatemala marks the earliest-known use of the Maya calendar, one of this ancient culture's renowned achievements.
원문출처 : https://www.cnn.com/style/article/maya-calendar-guatemala-pyramid-intl-scli/index.html
원문출처 : https://www.cnn.com/style/article/maya-calendar-guatemala-pyramid-intl-scli/index.html