Hey!

You haven't mentioned the name of the college or University in which you are enrolled in and want to know the date of internal exam. Anyhow to know about the dates of internal exam, you should check out the website of the college. But, you shall also check out with your batchmates and your respective teachers because internal exams are conducted by specific subject teachers and they shall be marking you on your internal assessment. So, confirm with your respective subject teachers first because as long as internal assessment is considered it's to do with your subject teachers and if it was semester exam then the details would be available on the website of the college.