Little example about mizzao:timesync.
let currentTime = new Date();
Tracker.autorun( () => {
// This will run automatically every time the serverTime updates. ie. every 60 seconds
TimeSync.serverTime(null, 60000);
currentTime = new Date( Date.now() + TimeSync.serverOffset() );
});
setInterval( () => {
// This calculates the approximate server time and updates the DOM every second
currentTime = new Date( Date.now() + TimeSync.serverOffset() );
document.getElementById('time').innerText = currentTime.toLocaleDateString();
}, 1000);