期間: period; term; interval.
含めて ---> 含める: 1. to include (in a group or scope), 2. to instruct; to make one understand, 3. to include (a nuance); to put in (an implication), 4. to put in (someone's) mouth, 5. to permeate with flavor.
In my interpretation, that sentence means that the exams/tests will be held in about 2 weeks later (in 2 more weeks), at the end of the month. There's 2 parts that I don't quite understand, 期間 and 含めて in that sentence. The exams/tests will be held an completed in a day, so I wonder what the meaning of 期間 in that sentence. 今日を含めて literally translated as 'including today', is it 'start from today' or 'after today' the 2 weeks period will be counted from?
Thank you in advance for your kind guidance.