You can choose the time filter for the data to be populated in the dashboard widgets.
Click the time filter drop down displayed below the Dashboard name on the dashboard page. By default, the time filter is set to Last 30 Days. You could choose options from the drop-down or define a specific data range too.
If the widgets in the dashboard have widget-level time filter configured, the widget-level time filter takes precedence over dashboard-level time filter. In such cases, the dashboard-level time filter is not applicable to widgets. For information on how to configure widget-level time filter, refer to Configure Widget-level Time Filter.