RFE: printf '%(fmt)T' prints current time by default

[Clark WANG]

In ksh:

$ printf '%(%F %T)T\n'
2012-11-14 10:57:26
$

In bash:

$ printf '%(%F %T)T\n'
1970-01-01 08:00:00
$

I think the ksh behavior is makes more sense so can we use the current time
as the default?

-Clark