July and August are the months of the year when I have more the most birthdays on my calendar. On In July, I have 6 six birthdays from of very close people, this these include my Mom, my sister, and my boyfriend, for whom I have to buy pretty good gifts; and 3 three others birthdays of people who are not so close.

"In a month," "in a year," but "on a day of the week" or "on a date."

On In August, I have 3 three birthdays from of very close friends, that who are also friends between them also with each other, so I have to buy differents gifts for each one. and This is a big effort because I spend many a lot of time looking for the right and a suitable gift for each person.

You could also write, "I spend much time looking for just the right gift for each person."

I don't like to buy anything just for the idea of buying a gift for a birthday. I like to buy things that really like appeal to me, as if how they are were for me. (I don't know how to say this sentence phrase in English: "como si fueran para mi.")

Birthday's Birthday Months

July and August are the months of the year when I have more birthdays to celebrate. On In July, I have 6 six birthdays from of very close people very close to me, this include including my mom, my sister, and my boyfriend, for whom I have to buy pretty good gifts, and 3 three others not so close.
On In August I have 3 three birthdays, from of very close friends, that who are also friends between them also themselves, so I have to buy differents gifts for each one, and this is a big effort, because I spend many a lot of time looking for the right, and suitable gift for each person. I don't like to buy anything just for the idea of buying a gift for a birthday.
I like to buy things that really like suit me, based on how they are for appeal to me. (I don't know how to say this sentence: "como si fueran para mi").[as if they were for me]