Its only christmas not the end of the world !?

why do so many people go panic buying at xmas??!! , i mean seriously the shops are only shut for 1 day how many spouts can you eat in 24 hours!! its the same with petrol stations did i miss something did i miss a fuel shortage or something the que of cars goes 2 miles up the road! , seriously people calm down , and merry xmas , jingle bells batman smells and all that stuff