Kitzur SA 123:2 Why No Learning on the Afternoon ofErev Tisha b'av 2 - M'qorot

Earller I wrote -
«The Minhag is not to learn erev Tisha b'Av after Hatzot
Even when Tisha b'Av is observed after Shabbat. »

See Moadim b'Halachah, "Hatzomot" "Topic 4 Eichah"
Hebrew edition pp. 355,6
The M'qor in fn 4 is a Yerushalmi Shabbos 16:1

Fn5 cites Rema b'sheim Maharil

Summary - Classic Ash'knazi methodology for Minhag
Yerushalmi - Maharil - Rema

------------------

Part 3 BE"H Taz, GRA, Hayei Adam
Shalom,
RRW