The sun is a bit over eight light minutes from the earth. If it were one full light day away, it would be 1/365th of a light year. At 8.3 light minutes, it is only 1/63367th of a light year.
Generally there is a 12-1 ratio. Just like the ratio of Fahrenheit to Celsius. As Celsius is how we measure the temperature on the moon, so is the years we measure.
As a result of the conservation of angular momentum, the slowing of Earth's rotation is accompanied by an increase of the mean Earth-Moon distance of about 3.8 m per century, or 3.8 cm per year.
The average distance to the Moon is 384,399 kilometres = 4.06318742 × 10-8 light years (Note the minus) The moon is only a tiny fraction of one light year from earth. It takes light from the sun...