Well its October 3rd today, which in the Hebrew calendar is Tishrei 15th.  This means that today is Sukkot or Feast of Tabernacles!  This Feast is from the 15th to the 21st of Tishrei, and can be found in:
Leviticus 23:33-44
Numbers 29:12
Deuteronomy 16:13-15
Zechariah 14:16-19
John 7:2-52 
The Feast of Tabernacles is the last of the seven mandated days of observation given by the Lord.  The Israelites were to celebrate this feast in recognition of the final harvest of the season and the provision that God had made throughout the year.  The Lord mandated that during this feast, and only this feast that Israel should rejoice and be joyful.  Along with the command to rejoice and remember all that the Lord had done for them, the Israelites were to leave the comfort of their homes to live in temporary "shacks" for lack of a better word, made of three sides and a roof made of leafy branches so that when laying down, the stars could be seen. 
The ability to see the stars was to be a reminder of how the Lord had brought the people of Israel out of slavery in Egypt into the Promise Land where they now enjoyed many comforts and blessings.  It was to remind them of the goodness, mercy, grace, and love of their God.
The importance of Christians celebrating or observing this holy day is tremendous, though a Christian is not a Jew, we must remember that our Messiah is a Jew, as is our Heavenly Father (The God of the Jews), the Apostles, and every man who wrote the scriptures by inspiration of the Ruach Hakodesh (Holy Spirit). It is of the utmost importance that the body of Yeshua in these last days come together and return to their roots, namely a Jewish Yeshua!  Remember that this is an appointed time in the Lords calendar where all believers can do as the Israelites did; not that we should live in a tent and camp in our back yards, unless of course you feel led to do so.  The point of the exercise was for the people of God to humble themselves, removing themselves from all the comforts of daily life, out of their comfort zone and into a place of humility where they could truly reflect on all the goodness the Lord has shown to them.  Psalm 34:18 tells us that "The Lord is near to those who have a broken heart, and saves such as have a contrite spirit."  In other words, when a man humbles himself, there is something powerful that takes place, he is able to reflect on the Lord in such a way that modern comforts distract us from doing.  Today as we celebrate Sukkot, take time to yourself, humble yourself in your private place and reflect on the goodness the Lord has caused in your life.  Remember that this holy day is the only one in which the Lord commands His people to rejoice!  Why you ask?
The reason for this is simple: John 1:14 tells us that "the word became flesh and tabernacled among us."  When Yeshua our Lord made Himself manifest in human form, He literally tabernacled among us!  The Lord Himself knew that this would happen and for this reason said to His people concerning this day "Rejoice and be Joyful."  Remember that the old covenant (Tanakh) speaks Yeshua concealed.  These scriptures are the shadow of the reality which was  to come, namely Yeshua.  Sukkot is the shadow of Yeshua, it foretold in secret the redemption of man through the sacrifice of one who was to dwell among us, therefore rejoice all who are called according to His name!  Again I say rejoice!
May the Lord bless you in this glorious day in which the promise of redemption was fulfilled!