$ git log --since="2 weeks ago" --until="yesterday"
+ [XXX: By default, "git log" displays author dates as "Date"
+ but then uses commit dates when given a --since option. That
+ seems like broken defaults to me. Why the inconsistency?]
+
Another useful option is -n or --max-count which, unsurprisingly,
limits the maximum number of commits to be displayed.