Hello everyone,
Glad to share the most-wanted compliance calendar. To begin with here you go:
HR Compliance Calendar for Karnataka (greythr.com)
HR Compliance Calendar for Maharashtra (greythr.com)
HR Compliance Calendar for Delhi (greythr.com)
HR Compliance Calendar for Tamil Nadu (greythr.com)
We have started with a couple of States as mentioned above. Stay tuned with us for the other States/UTs. 
Special thanks to @Sree!
Hope the above is of help to our community.
Regards,
Bhuvana Anand