H4 stamping appointment in Jan 2020 - chennai

Hi All,
I am traveling to india in Jan and i need to go for stamping.
I am trying to book the january appointment but still it is showing as not available.
Any idea on when they will open for Jan slots? But i can see empty slots in other locations.

It should be open, could be an issue with the system. Some have told same issue with Hyderabad consulate too. See, if you can see dates open for different consulate? Please post what you see at Dropbox Appointments Chennai, others can see and advise too