Adding ability to choose the timezone

[harbulot]

I'd like to suggest another selector for the time zone, since users may be in various time zones. I've used "z" for the formatter parameter, representing a time zone indicator in the RFC 2822 format (+xxxx or -xxxx).

The additional options are:

• showTimezone: true/false
• timezone: "+0100" (used by default if the time zone is missing from the value to parse)
• timezoneList: [{"value": "+0000", "label": "British Winter Time"}, {"value": "+0100", "label": "British Summer Time"}] or, if no labels are required, simply something like ["+0100","+0200"].

The default values and the list to present could be customized depending on the user.

This includes a test HTML file.

Here is an example, with an input like this:

 <input type="text" value="Mon, 28 Feb 2011 10:58 +0100"/>

and with a datetimepicker initialized like this:

.datetimepicker({ dateFormat: $.datepicker.RFC_2822,
                  timeFormat: 'hh:mm z',
                  showTimezone: true,
                  timezoneList: ["+0000", "+0100"] });

[Volune]

I suggest you add the support of the timezone in the _setTime function, with something like this :

var timezoneOffset = date.getTimezoneOffset();
var timezoneSign = (timezoneOffset < 0) ? '+' : '-'; //If your time zone is GMT+2, -120 will be returned.
timezoneOffset = Math.abs( timezoneOffset );
var timezoneHours = timezoneOffset / 60;
timezoneHours = ((timezoneHours < 10) ? '0' : '') + timezoneHours;
var timezoneMinutes = timezoneOffset % 60;
timezoneMinutes = ((timezoneMinutes < 10) ? '0' : '') + timezoneMinutes;
var timezone = timezoneSign + timezoneHours + timezoneMinutes;
if( tp_inst.timezone_select ) tp_inst.timezone_select.val( timezone );
else tp_inst.timezone = timezone;

I'm not familiar enough with jvascript or github to help more than this suggestion.