"Remind me in a minute", or how to count the time in the browser

Once a task came to the developer Methodius: to show a popup after a user-specified time with a reminder that time has passed. Methodius wrote setTimeout, pushed, closed the ticket. And the user did not wait for his reminder.

In this session, we'll talk about how browsers work with time, what time is in general, and how to show a reminder at the right moment.