EDT is actually the Eastern Daylight time. This time is observed in different places in the world during the summers. It differs according to these places. You have not mentioned which area of the EDT timings you are concerned with. However, it is known that the standard EDT is four hours behind the GMT. Thus if it is 8.30 according to GMT, then it will be 4.30 according to EDT. On the other hand in Nigeria it will be 9.29 pm.
