Sukkot is a Jewish holiday that celebrates the harvest season and commemorates the 40-year period during which the Israelites wandered in the wilderness, sleeping in tents. If you want to greet someone on Sukkot, here are some ways to do it:

• Chag Sameach: This means "happy holiday" and applies to most Jewish holidays.

• Moadim Lsimcha: This is used on both Sukkot and Passover, particularly the intermediate days of the festival. The traditional response is "chagim u’zmanim l’sasson" which translates to "holidays and seasons for rejoicing".

• Gut moed: This is the traditional Ashkenazi greeting on the intermediate days of Sukkot.

• Moadim lsimcha: This is the Sephardic greeting on the intermediate days of Sukkot.

In addition to these greetings, you can also wish someone a comfortable and blessed Sukkah, an abundant harvest, or Gods protection during the holiday. Its important to note that Sukkot is a particularly joyous holiday, so its nice to greet people with a smile and a warm demeanor.