TWEAK: don't use UTC in interpolation
TWEAK: don't use UTC in interpolation

Some dialects, for example, dialect.MySQL, will still convert time.Time
to UTC (2016-01-05).

This defers timezone conversion for dialects. One can create
app-specific dialect to maintain timezone info.

gocraft/dbr,orian/dbr,mailru/dbr,demdxx/dbr,antony360/dbr,playerbase/dbr