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Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
Thanks for stopping by @Suhill! A warm welcome to the Fitbit Community. That's too bad. I'd suggest restarting it a couple of more times and try to sync it, it might be that it is just stuck. If it is able to sync but your date is not there. You can manually log the sleep information and if it was tracking your sleep, during that time it should be on the memory of the tracker. 
To manually log your sleep, open your Fitbit App > Tap on the sleep tile > Enter the time frame. I hope this resolve the issue but in case it doesn't next step would be contact Customer Support.
Keep me posted on the resolution! 
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Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
Thanks for stopping by @Suhill! A warm welcome to the Fitbit Community. That's too bad. I'd suggest restarting it a couple of more times and try to sync it, it might be that it is just stuck. If it is able to sync but your date is not there. You can manually log the sleep information and if it was tracking your sleep, during that time it should be on the memory of the tracker.
To manually log your sleep, open your Fitbit App > Tap on the sleep tile > Enter the time frame. I hope this resolve the issue but in case it doesn't next step would be contact Customer Support.
Keep me posted on the resolution!
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Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
Hello sweetie @Suhill, thanks for replying! I'm glad to know that you're back on track. If you have time, please check our Discussions board where you will find other members sharing their experiences and tips for an active lifestyle, you might be interested in this topics: Looking for Fitbit Friends? Find some here! or How do you break out of your sedentary lifestyle? 
Happy stepping! 
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