The current dev snapshot does not accept ranges for field `eventdate` in `@InProceedings`. e.g. `2017-03-09/2017-03-11` Dates like this are usual and well parsed by `biblatex`.
The current dev snapshot does not accept ranges for field
eventdatein@InProceedings.e.g.
2017-03-09/2017-03-11Dates like this are usual and well parsed by
biblatex.