Although I agree with Dr. Mohannad Husain Al-Sherrawi's opinion, in terms of time, I prefer the autumn season (the beginning of the academic year in Iraq) to start a new research work.
I believe that the best time to start new research is to find the newness in the research after through literature study on the topic. Based on the literature survey, the best possible scope of work involved in the new research to achieve the objective is finalized. Now, if you start new research i am sure you would able to get the colourful outcome from the new research..all the best for your new research..