14 Kislev
Birth of Reuven, Jacob's first son and the first of the Twelve Tribes of Israel (Genesis 29:32). Jacob had originally worked for seven years in order to marry Rachel, but at the last minute Leah appeared under the chuppah instead. On their wedding night, Reuven was conceived. Though he was first-born, he eventually lost his leadership role, due to a reputation for impetuousness.

14 Kislev
And if not now, then when? (Ethics of the Fathers 1:14).
Hillel's famous statement is a bit enigmatic. The simple answer is, "Later." Why can't we take care of whatever it is some other time? Granted that procrastination is not a virtue, why does Hillel imply that if not now, then it will never be?
The Rabbi of Gur explained that if I do something later, it may indeed get done, but I will have missed the current "now." The present "now" has but a momentary existence, and whether used or not, it will never return. Later will be a different "now."
King Solomon dedicates seven famous verses of Ecclesiastes to his principle that everything has its specific time. His point comes across clearly: I can put off doing a good deed for someone until tomorrow, but will that deed, done exactly as I would have done it today, carry the same impact?
The wisdom that I learn at this moment belongs to this moment. The good deed that I do at this moment belongs to this moment. Of course I can do them later, but they will belong to the later moments. What I can do that belongs to this moment is only that which I do now.
Today I shall ... ... try to value each moment. I must realize that my mission is not only to get something done, but to get things done in their proper time, and the proper time may be now. See more books by Rabbi Abraham Twerski at Artscroll.com

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