Hijri and CE Date support

Any support for Hijri (Islamic Calendar) dates? We’re using a workaround of ‘Coverage’ with a numeric Timestamp data type but we’d ideally like to be able to use both Hijri and CE dates with timelines etc. As a reference for the issues with DC, https://dcpapers.dublincore.org/files/articles/952135713/dcmi-952135713.pdf might be interesting. Thanks