The time to daven maariv on Motzoei Shabbos is some period (where I am it’s around 15 minutes) after the stars come out. This period is called tosefes Shabbos. In many shuls, the shaliach tzibbur ...
Why don't we say Uvah Letzion on Shabbos by Shacharis and say it by Mincha? Moreover, we then commence to repeat it by Maariv. Why do we do that?