ubiquitin:
Sorry, the mistakes are yours. You obviously do not live in Israel and are unfamiliar with Tukochinsky’s luach. It is not just a quick guidebook to whether we say tachanun or not. In America, where there are endless variations in minhagim due to the melting pot effect of European immigration,they still argue whether to duchen on shabbos yom tov, whether to say Av Harachamim, and whether to have separate minyanim for tefillin (non) wearers on chol hamoed. The Ezras Torah luach does not decide these matters.
In Israel in the Ashkenazic non-chassidish community, except for minor exceptions, Tukochinsky’s luach rules. There are minhagim that are minhag Eretz Yisrael and everyone keeps them, or should. Check it out, you may learn something you don’t know. And come and visit us sometime, too bad you missed our bi’ur ma’asrot recitation this past Yom Tov after mincha. Don’t know what that is? It’s never too late to learn.
As for picking up new minhagim, lack of awareness of any minhag will always prevent one from adopting it. Learn, consider, and decide. Get rid of the silly minhagim and adopt the ones that make sense.Make yiddishkeit make sense and not nonsense.