How do I save the time and date when the game is exited?

guys how do i save the time from system in a variable when the browser is closed, and on next startup the time must be shown as text. thanks !!

Well. Usually you can use some kind of plugin to show "exact date and time" according to the system and IP of the client playing your game. In other way, you have to create a game which will run on your own cloud where you will set everything.

It's best to have a server from where you can get the real time. You can also use a plugin (I'm using this 'Date' plugin, I am not using my PC so I can't give you the download link), but plugins are not using internet, and they show you the date-time of the device which can be manipulated, or hacked...