An all to real point that I had overlooked inadvertently. I think adding a timezone parameter would be a fine change to the API. I'll look at it this evening, I've been meaning t

Chris Heller 
SAS - Advanced Analytics
Teragram Research & Development
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email: heller@teragram.com

On Nov 6, 2011, at 5:28 PM, Brandon Allbery <allbery.b@gmail.com> wrote:

On Sun, Nov 6, 2011 at 17:25, Heller Time <hellertime@gmail.com> wrote:
I rationalized the use of unsafePerformIO in the library by deciding that it was only being used in the case of a LocalTime instance (a user could always stick to UTCTime and avoid the issues) and that unless the machine running the program using time-recurrence was traveling across timezones (and the system was updating that fact) the program would essentially be referentially transparent :)

There's also late-night hackers doing stuff when DST changes (as it did in the US last night and Europe a week ago).

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