Myers Briggs Forum
I'm not sure if such thread already exists on this site, but here we go:
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January - INTJ
February - INFP
March - INFJ
April - ENFP
May - INTP
June - ENTJ
July - IxFJ
August - ExTJ
September - ISTJ / INTP
October - ENFJ
November - ISFP
December - xSTP