Are we to honor Jerusalem by keeping Shabbat according to her time?

According to Deut 16:6 you have the time to begin the sabbath. At even, at sunset; at Jerusalem at season (Passover)you came out of Egypt. So that is the universal time on the “clock of heaven” to start the sabbath. We have to set it at Passover every year and apply it for the year. If you use this time you have no worry about traveling in space - you will always be keeping a 24 hour seventh day Sabbath with heaven. (Not a 48hour as on a round world) Reply

If G-d established the Sabbath day based on where the creation of Adam and Eve occurred, assuming Jerusalem or somewhere thereabouts, then the Sabbath would begin and end at that point. If this wasn't true then G-d would have rested for more than a 24 hour day and not have gone back to work after the 24-hour Sabbath day. We need also to remember Adam and Eve were commanded to and kept the Sabbath day and did so with G-d in the Garden which lasted one day, not one and a half. The Sabbath was reestablished by G-d at Mount Sinai which is in the same time zone as Jerusalem and with with only minutes different in sunset. These points should confirm where and when the Sabbath begins and ends, it's not in Palau. Reply

the question about the ship is interesting. However, practically speaking, there are many opinions in jewish law as to exactly where the dateline is, so in those places there would probably be an obligation to keep shabbos for 2 consecutive days. Question would be when to put on Tefillin? Probably also both days. Another concept in jewish law which may be relevant here is whether the ship itself is considered according to torah law as one domain - thereby combining all inhabitants to one Shabbos day. Reply

Where does the day start? The International Date line is an artificial line. Imagine a ship sitting astride this line such that half is in each side. Let's say the ship is facing East. The Seventh Day begins in the rear (west) side of the ship when the Sun sets. However toward the front of the ship the sun has just set on the Sixth Day of the week. After 24 h the rearward passengers would be saying farewell to Shabbat, while the frontward passengers are lighting candles.
What would be the consequence of walking from one side to the other? Reply

Shabbat In Space Anonymous asked about keeping shabbat in space. Here is an article also from Chabad.org that discusses some about that, and also talks about a real Jewish astronaut that was wondering how to keep it.

chabad.org/library/article_cdo/aid/632169/jewish/Shabbat-in-Space.htm Reply

chagim? What about Jewish holydays which come milamata lemaala, from below to above. Is this not a major stira, refutation, to your argument against keeping Jerusalem times everywhere in the world? Reply

Shabbos times in space When would an astronaut keep Shabbos? Reply

Shalom! I Imagine the Bride Shabbat as a Living Procession marching across the earth, Beginning at Jerusalem and ending in Asia bringing Shalom to all who worship the Elohim of Aḇraham, the Elohim of Yitsḥaq, and the Elohim of Ya‛aqoḇ. We greet her as a longing loving Bridegroom not wasting a moment. If we could we would race to her in Jerusalem and escort her all across the face the earth to all His Set-Apart people. As in youth our hearts are excited, eager to celebrate Shabbat as the great gift approaches as the setting sunset begins the 7th Day. Reply

J-M is a woman had never realized gender specificity of Zion. Reply

Hi, Rochel Actually, the calculation of nightfall, according to the Alter Rebbe, is based, not on sea level but on the appearance of sunset at an altitude equivalent to that of the "high mountains in Israel" so many time-related Mitzvos are, in fact, being kept according to "Jerusalem time" or time at "Jerusalem altitude," if you will.

You can find this in the SIdur in Seder hachnasas shabbos Reply