Currently, we use inst.download somewhat inconsistently across the ecosystem. The question is whether the end date should be taken to be inclusive or exclusive. For example, if I want to download all of Jan 1982, should I invoke

inst.download(dt.datetime(1982, 1, 1), dt.datetime(1982, 1, 31))

or

inst.download(dt.datetime(1982, 1, 1), dt.datetime(1982, 2, 1))

This should be clarified in the docs before the next release.