Can I start a tfilla right before the "sof zman" even though I will finish AFTER the sof zman. Can we follow the beginning and say that the whole tefilla is considered b'zman?
Also, one must be mekabel shabbos before shkiya [תוספת שבת]. Can one then daven mincha of erev shabbos after shkia? Hmmmmmm.
And when is sof zman mincha?
