Understanding Monotonic and Wall Clock Time in the Go Time Package

The wall clock is the “real-world” clock that shows calendar dates and times, like UTC or your local time.

Since wall clocks can jump forward or backward, slow down, or speed up, measuring time intervals directly using the wall clock can cause errors.

In Go, only time.Now (might) carries both readings.

Modern operating systems usually keep track of two kinds of clocks: a wall clock and a monotonic clock.