Hi. I'm still on PHP5.4 (please don't either (a) laugh, (b) cry). Wanting to use DateTimeImmutable. No problem with polyfilling DateTimeInterface and DateTimeImmutable. Issue is currently DateTime does not implement DateTimeInterface. Once you've all mopped the tears from your eyes, I'm guessing there's no way to "coerce" DateTime to allow it to pass typehints of DateTimeInterface? Regards, Richard Quadling.