Empty Page with DateTime filter

[moz0817]

If I try to filter a DateTime field (dynamic or static) I get a blank page.
Tested with Lookup und Page-Schema.

[cmacmackin]

This is something I need and I'd be happy to contribute a PR to fix it, although I'm new to PHP and fairly inexperienced with databases. Are there any hints which could help speed up this work?

[cmacmackin]

Fixed with #605 and #638. Can be closed now.