Having the ability to Create up to three date field segments on a chart or graph would be great. For example, showing historical data on an annual basis (Segment I); current and near-term data on a quarterly basis (Segment II); and forecasted data on an annual basis (Segment III).
Sam Smalls commented
...oh, and being able to control the formatting of dates and graph/chart within each "segment" would be great also. Of course, the point is for it to look like one chart/graph (although) it really is more.