Change the time range or time zone format of a CloudWatch dashboard
You can change the time range to display dashboard data over minutes, hours, days, or weeks. You also can change the time zone format to display dashboard data in UTC or local time. Local time is the time zone that's specified in your computer's operating system.
Note
If you create a dashboard with graphs that contain 100 or more high-resolution metrics, we recommend that you don't set the time range to longer than 1 hour. For more information, see High-resolution metrics.
Note
If the time range of a dashboard is shorter than the period used for a widget on the dashboard, the following happens:
The widget is modified to display the amount of data corresponding one complete period for that widget, even though this is longer than the dashboard time range. This ensures that there is at least one data point on the graph.
The start time of the period for this data point is adjusted backwards to ensure that at least one data point can be displayed.