For Sending Date and Time You can use this function
var date = new Date();
var date = date.getUTCFullYear() + '-' +
('00' + (date.getUTCMonth()+1)).slice(-2) + '-' +
('00' + (date.getUTCDate()).slice(-2) + ' ' +
('00' + date.getUTCHours()).slice(-2) + ':' +
('00' + date.getUTCMinutes()).slice(-2) + ':' +
('00' + date.getUTCSeconds()).slice(-2);
Above will format the date and time in mysql format which you pass through variable to mysql query and then use setInterval
to pass current time after every minute
setInterval(function(){
$.ajax({
type:"POST",
data:"Time="+ date,
url:"serverRef",
success: function(data){
// On success
}
});
},60000);
Note: You can also use same technique in Server side as well