Convert 12-hour datetime to 24-hour datetime in JavaScript

Here I am going to share one function I have used to change the date from 12 hours to 24 hours.Recently I want to store date into the database and to store date into the database, you need to have a particular format, you can’t save as 12 hours AM or PM.

So, I have displayed a date as 12 hours with AM or PM and then apply following function which convert 12 hours date into 24 hours.

Let’s understand the code:

function convertDateTo24Hour(date){
    var elem = date.split(' ');
    var stSplit = elem[1].split(":");// alert(stSplit);
    var stHour = stSplit[0];
    var stMin = stSplit[1];
    var stAmPm = elem[2];
    var newhr = 0;
    var ampm = '';
    var newtime = '';
    //alert("hour:"+stHour+"\nmin:"+stMin+"\nampm:"+stAmPm); //see current values
    
    if (stAmPm=='PM')
    { 
        if (stHour!=12)
        {
            stHour=stHour*1+12;
        }
       
    }else if(stAmPm=='AM' && stHour=='12'){
       stHour = stHour -12;
    }else{
    	stHour=stHour;
    }

    return elem[0]+" "+stHour+':'+stMin;
}

That’s it. You can alert your date and check you get the right format of the date.

Also Read:

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Convert date from one format to another format using javascript

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