Well, we had Rosh HaShanah and Yom Kippur. Rosh Hashanah joyously marks the beginning of the Jewish new year, but its not 'quite' over yet. The festivities continues even now in the festival of Sukkot.
In this festival, the guys all build little huts and dwell in them. Its a reminder of when, upon leaving Egypt, a great cloud of glory stayed overhead as a reminder that God is with us. It can be made of lots of different kinds of material, but the roof has to be something that you can see some of the sky through.
Here are some examples of sukkot:
A random sukkah picture found on the net

This is from last year but, here's hubby taking a sukkah building break as the kiddlings look on.
On Rosh HaShanah and Yom Kippur especially, we (re)turn to God out of fear and regret. But on Sukkot, we (re)turn to God out of love!