Refine answer for when v6.d is going to come out

The date is the most pessimistic of those discussed, but probably the
most suitable and vague enough to give to the end user.

Author: zoffixznet

doc/Language/faq.pod6

@@ -26,9 +26,17 @@ $ perl6 -v
 This is Rakudo version 2017.07 built on MoarVM version 2017.07
 implementing Perl 6.c.
 
-=head2 When is v6.d likely to be released?
+=head2 When is v6.d going to be released?
 
-Not for some time since a lot of work is needed.
+Some time in 2018. The goal is to have something we want to call 6.d
+first, and for actual release dates to come later.
+
+You can already use some of the new features by using C<use v6.d.PREVIEW>
+L<pragma|https://docs.perl6.org/language/pragmas>. Also, many of the 6.d
+features were already implemented in 6.c compiler, due to the lack
+(at the time) of the infrastructure to support separate language versions.
+Thus, when 6.d is released, you may find you were already using many
+of the new features.
 
 =head2 As a Perl 6 beginner, what should I install?
 X<|Rakudo Star (FAQ)>