Alt text:
When Pope Gregory XIII briefly shortened the light-year in 1582, it led to navigational chaos and the loss of several Papal starships.
Alt text:
When Pope Gregory XIII briefly shortened the light-year in 1582, it led to navigational chaos and the loss of several Papal starships.
The boring answer is that in physics a year is just defined as the time it takes for the Earth to orbit the sun, they don’t care about calendars and leap years