Advent and the Second Coming of Jesus, The Christ

This time of year in the Christian Church is known as Advent.  It is a time of preparation as we await the celebration of the birth of the baby Jesus.  It is also a time of preparation as we await the return of Jesus, not as a baby, but as Lord of creation, "coming in the clouds with great power and glory" [Mark 13:26, see also Matthew 24:30 and Luke 21:27].  

Although we are told in the Bible that "No one knows about that day or hour, not even the angels in heaven, nor the Son, but only the Father" [Matthew 24:36, Mark 13:52], many people speculate as to when Jesus might return, based on events that have transpired in history, usually with the establishment of the Nation of Israel being a starting point.  

While it is true that there are differing opinions as to when this second coming of Jesus might occur, and equally true that the best thing might be to not speculate, but leave it in God's hands [where it already is], what is your opinion?  Do you believe we are in the "end times" and if so, when do you think Jesus might return?