In the US farmers have 28 days to get eggs in cartons. Once in cartoons eggs must be sold in 30 days. Store eggs can be quite old. Freshness is likely a big p

In the US farmers have 28 days to get eggs in cartons. Once in cartoons eggs must be sold in 30 days. Store eggs can be quite old. Freshness is likely a big part of flavor. I suspect that the US egg washing method may affect flavor as well. Home eggs typically aren't washed and are only a few days old. The eggs I sell were laid that week.