ISO week date
ISO week date is a way to show dates that is used by some countries and some businesses. It helps keep things organized.
Instead of using two different numbers to show the month and day, like September 13th, ISO week date uses a single number. This number is made up of how many weeks into the year it is and what day in that week it is. For example, the 13th of September would be written as 2019-W38-3. That means it's the third day of the 38th week of the year 2019.
Instead of using two different numbers to show the month and day, like September 13th, ISO week date uses a single number. This number is made up of how many weeks into the year it is and what day in that week it is. For example, the 13th of September would be written as 2019-W38-3. That means it's the third day of the 38th week of the year 2019.