<div dir="auto">See also the Rama in yoreh death 196, where he paskens that bdieved a woman can make a hefsek tahara after the tzibbur was mekabel shabbos. The shach explains that tosefes shabbos has nothing to do with nidda. Tosefes shabbos doesn’t turn day into night so anything related to night cannot be done, the Shach points out that you can’t count sefira during tosefes shabbos. </div><div dir="auto"><br></div><div dir="auto">As to yaaleh vyavo, the chiyuv to say yaale vyavo is based on the fact that you are supposed to mention Rosh Chodesh in the tefilos of the day. Once you davened maariv, shacharis, mussaf and mincha on Friday you have fulfilled that obligation. The tefilla of maariv on Friday afternoon is not a tefila of Rosh Chodesh and therefore has no chiyuv to say yaaleh vyavo. </div><div dir="auto"><br></div><div dir="auto">Lastly, this year in Israel the last day of Pesach fell out on Friday. We made early shabbos (as recommended by the Mishna Berura) and we davened maariv of shabbos and did not mention pesach. However, all of the Rabbanim stressed that the issurim of pesach had to be observed until nightfall (many people eat kitniyos that shabbos in israel) because that is a din of night, which fits in with what the shach in yoreh deah wrote. </div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, May 6, 2022 at 5:04 PM Marty Bluke <<a href="mailto:firstname.lastname@example.org">email@example.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)">The Taz in siman 668:3 discusses a similar case. If you are mekabel Shemini Atzeres early and start eating the meal during the day you don’t make a beracha on the succa even though astronomically it’s still the 7th day of succos. Also see the taz in siman 600:2 where he has an interesting question if Rosh hashana is Thursday and Friday and you don’t have a shofar and you make early shabbos and after you make early shabbos you get a shofar, can you blow? At the end there he explicitly references mila and states that mila is not affected by Davening maariv.