Honestly there is no fixed date. Actually the process of verification is precisely drawn up exercise and takes time of around 6 to 8 weeks. It is important to note that student can check the outcome of the verification result online. Please find below the link where students can check the Results of Verification/Revaluation of Marks:
Please take note that when you enter your Admit Card number / Roll Number, if you are getting the answer as 'Record Not found', then there is nothing to worry as it simply means that your application is still in the process and will take some more time. Generally it takes around one to two months for the re-verification / revaluation results to be updated on the ICAI portal. So you are advised to regularly check the notification section on ICAI website.