Hi

You can get class 11th and class 12th new updated reduced syllabus for all the subjects of CBSE board by visiting its official page the link for the same is provided below

http://cbseacademic.nic.in/Revisedcurriculum_2021.html

This syllabus will be very helpful in your preparation because it will let you know the topics and chapters which are included in your examination and , so go well through your syllabus and plan your studies so that you can score well in your board examination.

And yes, try to complete your whole syllabus at least a month before of your board examination so that you can give your last one month for practicing mock test papers and revision

Thank you