The numeral eight in Greek numerals, was written as Η, the eight letter of the Greek alphabet.
GOOD TO KNOW :)
One way of knowing if your coffee is freshly roasted is the “bloom effect”. When water is added to freshly ground roasted coffee , the coffee foam up.
This means the beans have been roasted in the last couple of days and means the coffee will be at its top. The bloom will be most noticeable in the first few days and will reduce afterwards as the gases in the coffee bean dissipate.
As time goes on and as the coffee gets less fresh it’s taste decreases in flavor.