this is because of the rotation example christmas is on 25th of december ( for england) but in astrallia its summer and their christmas is stil on 25 december but its a different season
comment if this does/doesnot help u and i will try to explain it deeper
A scientific theory is an explanation of the aspects of the natural world and which can be tested and verified. By the use of methods like observations, While the scientific laws are also based on repeated experiments or observations. Scientific theories are evaluated through the use of reasoning.