Why does watch vibrate for no reason?

I have the same problem. It seems that it vibrates every 24h after start or stop charging (usualy the same time for a few days) Is that possible? How to turn it off? 

I have the same problem. Every night at 11:34pm PST. When is the fix coming out garmin?!

Same same. It doesn't seem to align with the charge time that I noticed, but it does it at 12:17 every day since I got it about two or three weeks ago.

for me - at 5:45am every day, exactly an hour before i had set my alarm. i've turned off the alarm, turned on "do not disturb",  but it still buzzes and wakes me up.  thinking it might be the loading of the "good morning" message, which i would also happily delete.  

05:45am is when I get my 'Morning Report' (I don't think there's an option to change the time on that) and mine gives a tiny little vibration. you can disable that though: on the watch itself, go to Settings -> Morning Report, and there's a little toggle for Status (On or Off)

All-

Will you try the setting change that angelakru mentioned to see if this resolves your issue?  Please respond with your results.

Mine is already off and it still does it 

It's not related with the morning report. On mine it's for sure the time of start charging and it's changed after every recharge till the next one. There is no notifaction, it does not even light up, just the vibration. 

I haven't had the morning report on since the moment it was released I turned it off. That is not the problem. 

Is there a fix for this yet?  It’s driving me crazy.