Türkçe'de gün ve ay isimleri (The name of days and months in Turkish) 

In Turkish, the following month of december is

In Turkish, the previous day of wednesday is

Deniz: I started to five days of study from saturday. What is the name of last day in Turkish?

Devran: I am going to Istanbul tomorrow. I will be living there for 7 months.
Sude: Which month is it going to be your return?
Devran: You tell me. Start to count from this month, feburary,...

What is the name that month, in Turkish?
 

Assumption: All the months are equal with their calendar numbers. Such as March is equal to 3.
According to that assumption, can you calculate this:

[(Mayıs + Şubat) * Nisan ] - Aralık = ?

For prepearing the correct calendar, which of the following must be switched with each other?
(I) Ocak, (II) Mart, (III) Şubat, (IV) Nisan, (V) Haziran, (VI)Mayıs

December