I don’t think you understand. Every 365 days, the earth completes this orbit. Seasons are a result of the earths location on its orbital path. Every year is 365 days. On January 1st we begin the cycle over again. You cannot say a child who has been on the earth for 6 months, or travelled only half of the earths full orbit, is a year old because it is not true.What's the point of New Years then?