javascript - Full calendar Timezone Moment js Issue -


i've been wrestling while now, reaching out bit of please.

i have realtime multi timezone application uses signal r, datetimes stored , broadcast using utc , want manipulate them client side avoid multiple broadcasts different users if 1 appointment updated.

i'm trying fullcalendar display dates in appropriate timezone user, not based on browser local string held when user logs on.

is possible? or need store offsets , way (i hoping avoid this). using eventrender manipulate giving me other issues , have raise bug.

my code is:

   $(document).ready(function() {        function rendercalendar() {         $('#calendar').fullcalendar({             header: {                 left: 'prev,next today',                 center: 'title',                 right: 'month,agendaweek,agendaday'             },             editable: true,             timezone: "europe/istanbul",             eventlimit: true, // allow "more" link when many events             events: [{"id":1026,"tasktypeid":4,"title":"(new appointment)","start":"2015-06-11t11:00:00z","end":"2015-06-11t12:00:00z", "timezone":"utc","allday":false,"url":null,"location":"","people":null,"classname":"event-appointment"}],             eventrender: function(event, el) {                   if (event.start.haszone()) {                     el.find('.fc-title').after(                     $('<div class="tzo"/>').text(event.start.format('z'))                     );                 }              }         });     }      rendercalendar();  });

fullcalendar's time zone documentation explains named time zones expected calculated on server. while supports tagging events time zone, doesn't time zone conversion on client-side. unless behavior changes in future release, doesn't fit scenario described.

however, doesn't mean you're stuck. fullcalendar takes dependency on moment.js, , there add-on moment.js called moment-timezone. designed perform client-side time zone conversions using iana time zone identifiers, such "europe/istanbul" 1 show in sample.

when receive event signalr broadcast, can use moment-timezone convert utc desired zone before sending result fullcalendar event object.

var s = moment("2015-06-11t11:00:00z").tz("europe/istanbul").format(); // result: "2015-06-11t14:00:00+03:00"

a couple of additional points:

  • time zone data changes periodically, governments of world change minds offset , daylight saving time rules. stay on top of updates subscribing iana time zone announcements mailing list. it's reasonable expect updates time zone library within week or of iana release.

  • since using signalr, assume end must .net. fullcalendar documentation shows using php end, has support iana time zones. however, in .net can use noda time same functionality.


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