dateBefore predicate issue

[levimykel]

The dateBefore predicate sometimes gives incorrect results.

In my case I have a timestamp field with the following data:

When I do a query using the following predicate Predicates::dateBefore( {path}, new DateTime('2017-01-03')) it does not return the document above, which I would expect it to.

The following will return the document correctly: Predicates::dateBefore( {path}, '2017-01-03')

Therefore, I suspect that the conversion to a Timestamp needs to be fixed to account for time zones.

I'm also assuming that this needs to be done as well for the dateAfter and dateBetween predicates.