[whatwg] 'datetime-local' and 'datetime' comments

Nicolas Froidure froidure_nicolas at yahoo.fr
Tue Nov 27 08:54:59 PST 2012

On 27/11/2012 09:39, Mikko Rantalainen wrote:
> Nicolas Froidure, 2012-11-13 12:51 (Europe/Helsinki):
>> In my opinion, it's normal that datetime and datetime-local have
>> timezone and date/time don't. A date is timezone independant and time is
>> more a duration then a time relative to a particular instant of a
>> particular day.
> Unfortunately, "date" is definitely NOT timezone independent. When do
> you think "2012-11-28" does start? Some possible "correct choices":
> 	2012-11-27T16:00:00Z (Googleplex in Mountain View, California)
> 	2012-11-28T00:00:00Z (UTC)
> 	2012-11-28T02:00:00Z (Europe/Helsinki, my time zone)
> 	2012-11-28T11:00:00Z (Ian's time zone, I believe)
I think you're wrong. My birthday is 1983-04-28, i'll not program a 
party on 2012-04-29 if i live on a different timezone. I don't know the 
time of my birth, i just remember the date. So, for me a date is a 
generalization of a time with an error range of 24h.

If you want to save a time, just use a datetime field. I you ask a date 
you probably won't to save a precise time, just a day. Christmas day, a 
birthday or the mother's day.

Given that things, i suppose a date is timezone independent.
Nicolas Froidure

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