Which day is Jehovah's Witnesses sabbath?

The Jehovah's Witness do not observe any day as the sabbath, they meet on different days of the week as is convenient... Usually Sunday, but not always, as they believe that the old testament was done away with which includes the Torah and the 10 Commandments. To be more accurate, Jehovah's Witnesses recognize the purpose behind the Sabbath Day. The children of Israel were to rest on that day. For Christians, every day is the sabbath day; one long day continuing from the end of the sixth creative day. We have dedicated our lives to Jehovah to do his will, and so we rest from our own works. (Hebrews 3:12 through 4:11)