The Rhondda calendar

An oak tree trunk was found in July 2013, deep in a Rhondda valley peat bog, Wales. The artefact has been found to have a calibrated carbon date of about 4300 BC. Knife cut markings on the wood surface are interpreted as evidence of dual Sun and Moon calendars; the first comprehensible writing and reading in human history, a statement of five day weeks, four weeks a month, sixteen months a year, the Sun calendar year of 365 days, the Moon calendar of five day weeks, six weeks a month, twelve months a year.