Why today? Because it's an addictive song that I don't deserve to be hooked on alone. But also because today is Wednesday. On Wednesday we recite the verses "Lechu Niranina" in Shir Shel Yom.
The Frierdiker Lubavitcher Rebbe teaches: An explanation of the three verses beginning l'chu n'ran'na, in a manner meaningful to everyone, is as follows: Wednesday, we begin thinking: What will we have for Shabbat? This is a concern in the literal sense and also spiritually, "how can we Shabbos" (i.e. make a real Shabbat)? After all, every person is quite different on Shabbat than on a weekday. So we become a bit despondent. The solution is l'chu n'ran'na ("Come let us sing"), have faith, trust. Comes Thursday, it is now closer to Shabbat and we still have nothing. It doesn't seem to "n'ran'na" so easily and we realize we must do something. So we study Chassidus Thursday night, so that by Friday we sense the depth of "...for the L-rd is a great G-d and a great King1..."; and with this a Jew "can Shabbos." Original Yiddish.
