Preparation for Shabbat, the Jewish Sabbath, begins Friday afternoon with baking Challah and preparing a festive dinner. It is traditional to light the Shabbat candles 18 minutes before Sunset. The Shabbat evening prayers are traditionally said before dinner, but can be said after, and if there is a synagogue nearby, saying these prayers communally is traditional. Friday evening services end with kiddush, the blessing over bread and wine, and the Friday evening meal begins with kiddush. In the morning, the Shabbat liturgy is long, you typically spend all morning in the synagogue, and at the end of the service, it is quite common for synagogues to host a community kiddush lunch. You can, of course, go home for lunch. Saturday afternoon is a time for rest, social calls and leisure activity. There is a brief Saturday afternoon liturgy that can be right after lunch or before dinner. The dinner at the end of Shabbat typically runs into the early evening, ending with Havdalah, a brief service typically done at home to mark the end of Shabbat. Havdalah can be combined with the weekday evening service and should not be until 3 stars are visible in the sky (an hour after sunset if the sky is cloudy).
The blessings of the Havdalah ceremony mark the end of Shabbat.
to honour the shabbat
Friday
At a shabbat service at your home or at a synogauge you may light the shabbat candles and say the shabbat blessings. Also some people follow it with hallah and/or a kiddush.
Jews do not call the sabbat "Saturday", it is called 'Shabbat'. Shabbat happens to start Friday at sundown and ends Saturday at sundown, the 7th day of the week.
To make it easier for people to see what happens from start to finish.
Every Friday at sundown
Only in years where Yom Kippur happens to fall on Shabbat (Saturday). Otherwise, no.
Religiously observant Jews would not board a plane if Shabbat were to start while in transit. The issue wouldn't be landing during Shabbat, the issue would be flying during Shabbat.
You start all over again on the quests
You can drive around, get hit and runs or start a new game
Shabbat is the 7th day of the week, which is Saturday. All Jewish holidays start at sunset, so Shabbat starts on every Friday night and ends at Saturday night.