[Avodah] zman hadloko erev Shabbos and motzoei Shabbos

[Aryeh Stein]

>From Halichos Shlomo vol. 2:

While RSZA was normally noheg to wait 72 minutes to do melacha on
motzei shabbos like Rabbeinu Tam, on Motzei Shabbos Chanukah he would
like the chanukah candles before that time - between 35 and 40 minutes
after sunset.  (And, in accordance with the minhag yerushalayim, he
would light the chanukah candles before making havdalah.)

According to RSZA, those that hold like Rabbeinu Tam do not do so
because they believe that this is the "ikar din" but rather they do so
"b'toras chumra," and since waiting that long on Motzei Shabbos would
mean that the best time to light chanukah candles will have passed,
one should not be machmir like Rabbeinu Tam on Motzei Shabbos
Chanukah.  RSZA did not only practice this himself, but, when asked by
others, he told them to do likewise.

(As for erev shabbos chanukah, when the first night of Chanukah is
Friday night, according to RSZA, one should say "Al Hanisim" during
mincha if he lit the chanukah candles before mincha (even though it's
only the 24th day of Kislev).  (And at least one local shul, in which
they first lit the menorah and then davened mincha, said Al Hanisim
during mincha - including during chazaras hashas.)  The reason Al
Hanisim is said (according to RSZA) is not that Chanukah has begun -
because it hasn't, but because, once we light the menorah, the chiyuv
of hoda'ah for the nisim begins.)

KT,
Aryeh