Thankfully, in most instances, this should be an easy fix. Make sure your Fitbit is adequately charged (more than 50 percent) ...
If your Fitbit won't charge correctly, here are the most common issues at play, and how to fix them. Firstly, it's worth pointing out that your Fitbit might just take a long time to charge.
Besides, not syncing your Fitbit with your host could be one of the reasons why the Fitbit clock displays the wrong time. Here's how to sync with Fitbit: If syncing doesn't fix the time on your Fitbit ...