For a UI that will show information on various technical systems (servers), I would like to add a UI element saying something like: "Last data load time: (timestamp)"
The trick is that the actual conditions are somewhat more complex. The data shown in this UI is loaded from multiple other sources and is expected to be loaded daily. This daily timestamp would be expected to be shown in the UI element mentioned above, i.e. it should always be within the last 24 hours in normal operation.
However, the data that is loaded may itself be out of date, whether by hours or (in some cases) by many days. It's always the most recent data available that is loaded, but the sources from which data is loaded are themselves subject to delays in collecting their data.
So the timestamp doesn't represent "timestamp of all data" but rather "the latest possible information in this UI," in other words, no data in the UI is more recent than this, but some of it may be less recent.
How should this UI element be phrased to communicate accurately without misleading users?