The conversation between human and AI assistant.
Why does February have 28 days? Why 29 in leap years?
But why do we have leap years?
We have leap years because the Earth doesn't orbit around the sun in exactly 365 days. In fact, it takes about 365.24 days to complete one orbit. To compensate for this, we add an extra day to the calendar every four years, making a leap year. This extra day is added to February, which becomes 29 days long during a leap year.