
With the recent update to watchOS 2, Apple added a new feature called Time Travel, which lets you turn back (or forward) time to display certain information from a different date and time.
It works with complications on the watch face, like weather, calendar events, sunrise and sunset, stocks, and more. Depending on what you have displayed on your watch face, you'll see different information.
Understanding Time Travel can be a bit confusing for some, so we'll explain it more in detail, with some highlights on what different watch faces can do.

Before using Time Travel, be sure to set your complications the way you want them. Now that Apple allows third-party complications, the options are even better.
This feature works best with such watch faces as Utility, Modular, Simple, Color, and Chronograph because those faces have the most customizable complication options.
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Article Link: How to Use Time Travel on Apple Watch in watchOS 2