I'm not sure about that but I do know that the United States is one of the only countries in the world that sells eggs in the refrigerator section of the grocery store. If you go to most European countries eggs are sold warm in the store and usually kept in the kitchen in a basket on the counter or dining room table.I have heard of you do not refrigerate an egg it will last months, once refrigerated they must remain so or they will spoil.
Old wives tale.... Maybe maybe not
Filipinos have balut which is a fertilized egg close to hatching that is buried in the sand sometimes or steamed and then there's the 100-year-old egg that's Chinese that's not actually 100 years old. Just a couple of weeks and they're treated it with sodium hydroxide. Honestly I've never had the stomach for trying either because they both look and smell disgustingIsn't there an Asian culture that buries 'em for years?
What he said with Water glassing will work with the eggs fresh from the chicken. Store bought eggs would need to be pickled for extended length as they are washed. Also, eat the dirty eggs and waterglass the clean ones, if you do it.