These fields show the date the monitor was manufactured.
Manufactured Week Note
Some manufacturers do not follow the standard for this information and instead display the manufactured month and not the ISO week as defined by the EDID standards. This means that you might see a higher than normal rate of monitors with weeks numbered 0-12.
If you see, “0,” in the week field, this generally means that the manufacturer set the manufactured week as the whole year. If you see the numbers 1 through 12 in this field, this generally indicates that the manufacturer set the manufactured week as a month rather than a specific week.