Sorry for jumping in. I wasn't aware of a patch.�� Changing tz��on Date seems like a mistake but I haven't been paying close attention to the reasoning behind the change.�� I defer.����

On Mon, Apr 9, 2018 at 2:20 PM, Sean P. DeNigris <sean@clipperadams.com> wrote:
Ron Teitelbaum wrote
> (DateAndTime fromString: '1990-01-01T00:00:00Z') asDate start ->
> 1990-01-01T00:00:00-04:00

I don't understand. On Pharo 6.1, `(DateAndTime fromString:
'1990-01-01T00:00:00Z') asDate start. "-> 1990-01-01T00:00:00+00:00"`

The start DateAndTime instVar is exactly what the patch changes.