This scenario is for a lookup data set that's uploaded monthly. Ideally we'd like it to apply to all events during that month/ time period until the next upload

Do we know of a best practice in CJA to observe a time/ date for external data appended or joined?Right now, uploading a table of external data monthly does not tie to a time or date range (ie it's static), and we haven't found a straightforward way for CJA to 'remember' or date stamp upon upload.