According to most rihonim shekiya is what we call astronomical sunset. Rabbeinu Tam says that shekiya is actually a time period that starts from sunset and ends about an hour later. According to him you can daven mincha until the end of shekiya. This davening “late” mincha is mostly by Hungarian and Galitzianer chasidim. The Polish and Russian chasidim daven until sunset. One reason for davening mincha late is that mincha is a time of “din” and we want to push it away as long as possible.
“How can someone (either a bt or ffb) become Chasidish?
What’s the reason for the different “havoros”?
And why is it called the Chasidish Havora, when some non-Chasidim (i.e. “Oberlanders”) use it? (And some Chasidim [i.e. Stolin] use the Litvish Havora!)
And where exactly do “Oberlanders” fit into the Chasidish/Litvish picture? “
Answers: You become chasidish by following the customs of a chasidic sect and adhering to the rebbe in all ways.
The different havoros come from historical changes in pronounciation like any other languistic dialect. It’s called the chasidish havoro because only chasidim use it. Stolin and Chabad pronounce Litvish because that was the havoro in their areas. The havoro is more a geographical dialect rather than a sectarian one. Oberlander are not generally chasidish but some are or have become over time. Their dialect is partially chasidic and partially Litvish. Their customs are generally pure Ashkenaz or somewhat like the German Jews. They are definitely not Litvish in nature or customs.