Hi @Sweatheart the date and time come from the devices we use to sync. It's possible your Charge 5 did a sync and the time corrected itself. Keep an eye on it to be sure, but it's probably fine now. Some people don't sync often enough and their devices show the wrong day or time. A sync usually puts it back to rights. If you develop a glitch, a restart of your Fitbit usually puts things right. A restart is similar to restarting your phone or computer and no data is lost.