Shalom: Hebrew word meaning Peace, Completeness, Prosperity….It is used to say Hello, and Goodbye. Every hebrew word is like an onion, there are layers of meanings. How you say Shalom, gives the meaning in which you want to say it.
Shabbat — This is the Hebrew word literally meaning a Ceasing or Stopping. This word is always used the the Hebrew Bible for the seventh day, the Shabbat, the day work ceases for the purpose of rest.
So On Friday until Saturday at sun down, we say SHABBAT SHALOM!