But if best practices have been followed in preventing regularly changing data from being inside the root volume group, this option can provide ample time for testing and deployment.

You can use the History button in the previous panel to display historical data about how the indicators of a group evolve over time. Historical data is plotted on line charts showing.

In other words, this group of tags allows the page author to explicitly set the locale and time zone that the other FMT tags will use when formatting data.