Typically, bread is delivered to grocery stores on five days of the week: Monday, Tuesday, Thursday, Friday and Saturday...
..each day has a specific color twist tie: Monday=blue, Tuesday=green, Thursday=red, Friday=white and Saturday=yellow..
the colors are in alphabetical order; blue green red white yellow and Monday through Saturday respectively. Easy to remember
So if you went to the store on a Wednesday, you would want to look for the bread with a green twist tie... not the red twist tie (almost a week old!)
Enjoy your fresh bread while others are amused at the bright colors!