On Sat, Jun 9, 2012 at 2:53 PM, Sven Van Caekenberghe <sven@beta9.be> wrote:

On 09 Jun 2012, at 14:24, Mariano Martinez Peck wrote:

> The seconds/nanoseconds are always positive when normalized.
>
> Are you sure?
> I have just changed (for testing) to this:
>
> DateAndTime localTimeZone: (TimeZone timeZones detect: [:tz | tz abbreviation = 'EST']).
>
> And now if I do:
>
> DateAndTime now offset asSeconds ----> -18000

The seconds/nanoseconds in DateAndTime itself are like that,
the TZ offset can be positive and negative:

http://en.wikipedia.org/wiki/Timezone

<<Most of the 40 time zones on land are offset from Coordinated Universal Time (UTC) by a whole number of hours (UTC−12 to UTC+14), but a few are offset by 30 or 45 minutes.>>

Ok, perfect. And what about durations outside DateAndTime. Say if I do: "-123 seconds" is that valid? I mean, should we accept normal durations (not the instVar offset of a DateAndTime) with negative seconds/nanoseconds?

thanks