Are there any other “mitzvot” besides counting S’fira that are cumulative? In other words, if you forget a day of S’fira you can no longer count with a bracha. Are there any other types of mitzvot ...
I have heard that there are people who keep Shabbos till Tuesday. I would like to understand how that works practically. A few examples of puzzling situations: What shmoneh esrei does such a person ...