The Years of Anharos (originally Years of the Sun) is a dating system followed in the Kingdom of Evenhold and much of middle Addar that was established by King Anharos 1,200 years ago. That first year and all after it are identified as YA, while years before it are identified as BA (before Anharos). For example, Anharos lived from 36 BA to 49 YA.
Anharos decreed the start of the new reckoning as one of his earliest official acts as the first king of the united Kingdom of Evenhold, naming it the "Years of the Sun" in honor of the sun-god Alaxar. However, following the death of Anharos in 49 YA it became more commonly identified with the name of the beloved king.
The dating system reset the year but otherwise kept the same 6-days-per-week, 61-weeks-per-year arrangement (the Ovidoric calendar) already in use in Aevinn.
Other uses
"The Years of Anharos" may also refer to the historical period from 1 YA to 209 YA when the House of Anharos — the king or his lineal descendants — ruled the Kingdom of Evenhold. The period ended with the War of the Twins and the rise of the Council of Twelve.