This was known as the New Fire Ceremony. When dawn broke the first day of the new cycle, torches were lit in the temples and brought out to light new fires everywhere, and ceremonies of thanksgiving were performed. In the post-classic Aztec calendar, there were 13 Lords of the Day. These were gods (and goddesses) who each represented one of the 13 days in the trecenas of the 260-day calendar. The same god always represented the same day. Quetzalcohuatl (The feathered serpent), for example, always accompanied the 9th day. There are only nine Lords of the Night, which means that they cannot always represent the same day, but the list of gods repeats itself again and again so each lord accompanies a new number each trecena. Some think that there are nine Lords of the night because they are connected to the nine levels of the underworld. The 365-day and the 260-day calendars identified and named the days, but not the years. The combination of a solar year date and a 260-year date was enough to identify a specific date to most people's satisfaction, as such a combination did not occur again for another 52 years, above general life expectancy. To measure dates over periods longer than 52 years, the Mesoamericans devised the Long Count calendar. This calendar system was probably developed by the Olmecs and later adopted by the Maya. The use of the long count is best attested among the classic Maya, it is not known to have been used by the central Mexican cultures. The Long Count calendar identifies a date by counting the number of days from August 11, 3114 BCE in the proleptic Gregorian calendar or September 6, 3114 BCE in the Julian Calendar (-3113 astronomical). The Long Count days were tallied in a modified base-20 scheme. Thus 0.0.0.1.5 is equal to 25, and 0.0.0.2.0 is equal to 40. The correlation is based on historical, archaeological and astronomical evidence. The commonly established way of expressing the correlation between the Maya calendar and the western calendars is to provide number of days from the start of the Julian Period (Monday, January 1, 4713 BCE) to the start of creation on 13.0.0.0.0 4 Ajaw, 8 Kumk'u. The most commonly accepted correlation is the "Goodman, Martinez, Thompson" correlation (GMT correlation). The GMT correlation establishes that the creation date occurred on September 6 (Julian) or August 11 (Gregorian), 3114 BC (-3113 astronomical), Julian day number (JDN) 584283.