When do people who live in places where it is dark for days Daven Shachris and put on Tefillin? Please provide a source (Mareh Makom).
If there is a camera in Israel that is operating on Shabbos, am I (a person living in America, where Shabbos only starts 6 or 7 hours later) allowed to view such a camera? I suppose the same could be ...
This week, the island of Samoa is switching time zones, causing it to skip from Thursday directly to Saturday. Out of simple curiosity, what implications might this have on any Jews on the island? ...
If I take off from Melbourne on Motzei Shabbos, I will hit the Date-Line, loose a day, and end up flying on Shabbos for a short period of time until the sun catches up again. Am I allowed to do this? ...
If I fly westward on a fast day, and travel through one/several time zone/s, thereby going back in (clock) time, must I then fast until it ends in my current time zone? What if I fly eastward, thereby ...
OK, we've got some discussion going on about issues affecting life within the gray zone of the Halachic Dateline and the International Dateline, but what is the original source of such a concept, if ...
For example, if I live in New York, could I send a fax (causing the machine to print a document) to Israel on Friday afternoon, before it is Shabbat for me, but after Shabbat has started there?