A warm welcome to the Community, @Marie-Thérèse.
If your tracker isn't showing the correct time, I recommend changing the timezone to a complete different one, sync your tracker, put the correct time and sync again. To change the timezone, follow the instructions in the help article: How do I change the time on my Fitbit device?.
Also, make sure that your tracker is syncing constantly and that the device you are using to sync has the correct time too.
Let me know the outcome. 🙂
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Best Answer