Question: what are holy days in judaism?
Answer: Shabbat. The day of rest and weekly observance of God's completion of creation.
Rosh Hashanah. The Jewish New Year—a holiday observed with festive meals and a day spent in prayer or quiet meditation.
Yom Kippur. ... 
Sukkot. ... 
Shemini Atzeret. ... 
Simchat Torah. ... 
Hanukkah. ... 
Tu B'Shevat.