"Shabbat Shalom" (peaceful sabbath) is an appropriate form of "goodbye" from about
late Friday morning until about Saturday afternoon.
Between sundown Friday night and sundown Saturday night, it's also good in place of "hello"
when meeting in person ... (i.e. not on the telephone).
In French, you would say "Bon shabbat" for Sabbath greetings or "Shabbat shalom" can also be understood in French.
Yes, that's the customary response.
Shabbat shalom is a Jewish greeting which we say during the day of Shabbat. See also:More about the Jewish Shabbat
'Shabbat shalom', which means 'A peaceful Sabbath', is said during Shabbat - sundown Friday to Saturday after twilight.
Shabbat Shalom is a greeting that Jews say to each other on Shabbat (the sabbath). It means "A peaceful Shabbat"
Yes and no. Shabbat Shalom is only said on Fridays and Saturdays.
"Shabbat Shalom!"
Yes.
You can't say Happy Friday in Hebrew, but a common greeting on Friday afternoons is Shabbat Shalom (שבת שלום).
You respond the same way: Shabbat Shalom
Yes.
You say "Shabbat shalom" right back to them.