For those that hold Yom Ha'Atzmaut to be a 'chag' or 'pseudo-chag' (to whatever extent, see here), does it directly follow that tachanun is not said at mincha on erev Yom Ha'Atzmaut?
[Collected from the writings of Ha-Rav Aviner]
- Tachanun on Erev Yom Ha-Atzmaut It is proper to recite Tachanun at Minchah of Erev Yom Ha-Atzamaut, as the Chief Rabbinate of Israel has decreed this day "Remembrance Day for the Fallen Soldiers of Tzahal," which is a day of mourning.
Iturei Cohanim #97, Shut She'eilat Shlomo 3:147, Sichot Ha-Rav Tzvi Yehudah: Medinat Yisrael #34 p. 7, Sichot Ha-Rav Tzvi Yehudah: Yom Ha-Atzamaut ve-Yom Yerushalayim p. 73, Sichot Ha-Rav Tzvi Yehudah: Eretz Yisrael pp. 264-265
R Eliezer Melamed in Peninei Halacha (Tefila 21:7) writes we do not say Tachanun on Erev Yom Haatzmaut
Today, ever since Hashem began to bring forth our redemption, Tachanun is not recited on Yom HaAtzma’ut (Israel’s Independence Day), and on the 28th of Iyar, Yom Yerushalayim (Jerusalem Liberation Day), nor at Minchah before each of them
This is also the opinion of the Chief Rabinate of Israel (quoted here from 2012)
... the Rabbanut explains that, in their opinion, Tachanun should not be said today at Mincha of Yom HaZikaron, Thursday being Yom HaAtzmaut, and on Friday 5 Iyar.