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Well, what do you know!

It’s something we touch almost daily, but few people ever realize that bread bag twist ties hold a secret message. That’s right, those colorful fasteners you barely give a second glance tell a tale that goes beyond expiration dates and ingredients lists. As Tasting Table recently pointed out, the color of the ties are far from arbitrary. In fact, each color indicates which day of the week the bread was baked on. Mind = blown.

The most commonly-used code for 5-day delivery schedules is blue for Monday, green for Tuesday, red for Thursday, white for Friday, and yellow for Saturday. Most stores don’t get deliveries on Wednesdays and Sundays.

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It’s an interesting fact, but experts say it’s not something shoppers should worry about. The color coding is used to make it easier for employees to replace stale loaves with new ones, so ideally, only the freshest bread will be available when you hit the aisles.