使用javascript或momentjs将UTC时间仅转换为本地时间（无日期）

Question

I am fetching a string from database which is in a 24hr format and is stored in UTC time. For example "18:00:00". I would want this time to be converted into local time only (no date is required), wherever the time zone may be and display it in 12hr format. For example, if the timezone is Australian Eastern Standard Time, I have to find out the time difference which is 11 hrs ahead of UTC time and display it as "05:00 AM" and also do the vice versa of local time only into UTC time only (no date is required) so that I can save it back to database. I have searched a lot for it but everyone mentions about converting date object from UTC to local or vice versa but not for time only. Please help me out with this.

Answer 1

 let utcTime = "18:00:00"; let utcText = moment(utcTime,'HH:mm').format("HH:mm"); let local = moment.utc(utcTime,'HH:mm').local().format("hh:mm A"); let localTime = local;//setting local time let utc = moment(localTime,'hh:mm A').utc().format("HH:mm"); $("#utc").html(utcText + " (UTC Time)"); $("#local").html(local + " (Local Time)"); $("#utc1").html(localTime + " (Local Time1)"); $("#local1").html(utc + " (UTC Time1)"); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.19.2/moment.js"></script> <div id="utc"></div> <div id="local"></div> <div id="utc1"></div> <div id="local1"></div> 

Create a moment object using time and type , then convert to local timezone using local()