Bread Tie Color Codes

is it true that bread ties are color coded to tell what day the bread was baked? if so, is there more than one code or individual company-based ones? what is the code?

A local bakery once used this code:

Red = Monday
White = Tuesday
Blue = Wednseday
Green = Thursday
Yellow = Friday

I don’t if this is universal.

At my dad’s store, I don’t remember the codes, but there were no deliveries on Wednesdays. Instead there was a delivery on Saturday. People would rather have bread that was one day old than two days old.