Sometimes, we want to set a mock date in Jest.

In this article, we’ll look at how to set a mock date in Jest.

How to set a mock date in Jest?

To set a mock date in Jest, we can use the useFakeTimers and setSysttemTime methods.

For instance, we write:

jest
  .useFakeTimers()
  .setSystemTime(new Date('2022-01-01').getTime());

to call useFakeTimers to let us mock timers.

Then we call setSystemTime to set the time of the mock timer by calling it with a timestamp in milliseconds.

Conclusion

To set a mock date in Jest, we can use the useFakeTimers and setSysttemTime methods.