Is there a standard way for a web server to be able to determine a user's timezone within a web page?   Perhaps from an HTTP header or part of the user-agent string?...
I have a line that sets the current date and time in a cell:   sheet.getRange(1,1).setValue(new Date());   Then I have a line that creates a formatted date based on that cell's value:  var addedDate = sheet.getRange(1,1).getValue(); var addedTime...
To handle dates, i'm using a jQuery UI public method in my application: jQuery.datepicker.formatDate See params & source here : https://github.com/jquery/jquery-ui/blob/master/ui/jquery.ui.datepicker.js  However the wrong date is displayed so...
I feel as if I have poured over nearly all of the documentation regarding dates in JS and GAS. Especially concerning DST issues. Since I have not had a problem like this until the DST change. I think I am missing something simple. The problem is that...
I want to calculate the offset from 'users time' to 'WET/WEST'.  I get the users offset with new Date().getTimezoneOffset().  But how do I get the offset for WET/WEST So that I can calcluate the combined offset of both?  For example,...
I would like to get the timezone difference between New York and Hong Kong with Node.js moment module. I have done some preliminary work.  var NewYork_time_hr = moment().tz("America/New_York").format('HH');  var HongKong_time_hr = mom...
Is there a way to check if timezone name valid or not in JavaScript without using external library?  When user enters timezone name in text field I want to verify whether zone is valid or not?  I know we can do it easily using moment-timezone library...
I have a challenge where backend data is always stored in UTC time. Our front-end data is always presented in CST. I don't have access to this 'black box.'  I would like to mirror this in our data warehouse. Which is based in Europe (CET)...
I found many solution that gives Timezone name from offset value. But I have Timezone name and I want offset value for that. I tried setTimezone('Asia/Kolkata'), but I think their is no method like setTimezone.  example:  Asia/Kolkata should...
I'm trying to check for isDST() (returns true or false if daylight saving time is active). It works fine if I use the current date time- for example var isdst = moment().isDST() returns true for my timezone. However, what I want to do is first se...

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