1)
Why should the day be dark?
1.
Rashi: Every year, my birthday should be dark.
2.
Ibn Ezra (3): The day should not exist.
2)
Why should Hashem not be Doresh (investigate) it?
1.
Rashi: He should not be Doresh its (the day's) good.
2.
Malbim: This refers to the darkness. Hashem will not be Doresh it for any need.
3)
What is "Naharah"?
1.
Rashi: Its light. The Targum of "Tzohar" is Nihur. Malbim - usually, there is some light on cloudy days; no light should come. It should be totally dark.
