Events

• The beginning of the Mayan calendar
• An earthquake near a Neolithic culture at Sotira in Cyprus
  Cyprus
  Cyprus , officially the Republic of Cyprus , is a Eurasian island country, member of the European Union, in the Eastern Mediterranean, east of Greece, south of Turkey, west of Syria and north of Egypt. It is the third largest island in the Mediterranean Sea.The earliest known human activity on the...
  
   destroys much of the local infrastructure.
• In Syria, mass graves at Tell Brak, dating from ca. 3800 to 3600 BC, were unearthed, suggesting advanced warfare around this period.

Calendar epochs

• October 7, 3761 BC—The epoch
  Epoch (reference date)
  In the fields of chronology and periodization, an epoch is an instance in time chosen as the origin of a particular era. The "epoch" then serves as a reference point from which time is measured...
  
   (origin) of the modern Hebrew calendar
  Hebrew calendar
  The Hebrew calendar , or Jewish calendar, is a lunisolar calendar used today predominantly for Jewish religious observances. It determines the dates for Jewish holidays and the appropriate public reading of Torah portions, yahrzeits , and daily Psalm reading, among many ceremonial uses...
  
  
  • • September 25, 3760 BC—First day of the modern Hebrew calendar (the creation); late in AM 1.