The beginning of the Muslim holy month of Ramadan on Friday evening brings us back to the ways sacred calendars are created. The first way a year was calculated in human history was by the cycle ...

The beginning of the Muslim holy month of Ramadan on Friday evening Feb. 28 brings us back to the ways sacred calendars are created. The first way a year was calculated in human history was by the ...

Ramadan is one of the most sacred times for Muslims and it comes to an end on March 30 with the celebration of Eid al-Fitr.

Maya farming was successful because of the accurate and detailed calendars people used. The Tzolkin calendar was also known as the Sacred calendar. It was 260 days long and it was used to keep ...