Google Apps Script - Delay sending an email by 48 hours -

i need delay sending email by 48 hours. i've tried:

var mail_date_plus_2 = new date(date.setdate(mail_date+2)) 

but error:

"referenceerror: "date" not defined. (line 26, file "code").

here script:

function sendemail() {   var ss = spreadsheetapp.getactivespreadsheet();   var data_sheet = ss.getsheetbyname('sheet1');   var values = data_sheet.getrange(2, 1, data_sheet.getlastrow(), data_sheet.getlastcolumn()).getvalues();   var row = 2;   var current_time= new date();   logger.log('current data , time '+current_time)   for(var v in values) {         var mail_note = data_sheet.getrange(row, 1).getnote();     if(mail_note=='') {       var mail_date = values[v][5];       if(mail_date!='') {                 if(current_time>mail_date) {           logger.log(v+'>>need send mail @ '+mail_date);           var name  =  values[v][2];           var email =  values[v][4];           var form  =  values[v][1];           var htmlbody = reservation_email_html;           var prefix = 'dear '+name+', '+"<br/><br/>";           htmlbody = prefix + htmlbody           if(form=='reservation') {mailapp.sendemail({              to: email,              subject: email_subject,              htmlbody: htmlbody,                   });           }           var cdate = new date();           data_sheet.getrange(row, 1).setnote('mail has been sent @ '+cdate)         }       }     }     row++;   } } 

where date is, need change mail_date. firest make sure mail_date date type. can check javascript variable types key word typeof.

var mail_date = values[v][5]; logger.log('typeof mail_date: ' + typeof mail_date); 

if mail_date not date type, convert date:

var mail_date = values[v][5];  if (typeof mail_date !== 'object') {//in javascript date "object" type   mail_date = new date(mail_date); };  var mail_date_plus_2 = new date(mail_date.setdate(mail_date+2))