I Am Fine.

Recently, I have been looking at the calender and smiling.
I used to get angry and upset when my students bothered me.
Now, I have only one month to go!

Whatever they do it is fine with me. 

I am fine.

Present Perfect Continuous tense vs Present progressive tense

There are some different questions of verb tenses here, because you are speaking both past and present tense.

http://www.englishpage.com/verbpage/presentperfectcontinuous.html

http://english.stackexchange.com/questions/89579/present-simple-instead-of-present-perfect

1. Recently/Lately/Of late I have always been looking at the calendar and smiling.

(I think that with lately it must be this way)

2. I have noticed recently that I am always looking at ...

(this is another variant - some may not agree with it!)

3. These days I am always looking...

(with 'these days' ... you can use the present continuous tense)

I used to be get angry and upset whenever my students bugged/were bugging me.
Now, I have only one month to go!

Whatever they do, it's fine with me/I am fine with it!!! ^^