If you study the fall feasts of the Lord you will understand that you are misunderstanding of these verses:
Now learn a parable of the fig tree; When his branch is yet tender, and putteth forth leaves, ye know that summer is nigh:
 So likewise ye, when ye shall see all these things, know that it is near, even at the doors.
 Verily I say unto you, This generation shall not pass, till all these things be fulfilled.
 Heaven and earth shall pass away, but my words shall not pass away.
 But of that day and hour knoweth no man, no, not the angels of heaven, but my Father only.
 But as the days of Noe were, so shall also the coming of the Son of man be.
The fall feasts of the Lord
You see . The first 4 days have been fulfilled . That happend when Yeshua came 2000 years ago.
Now we are waiting for the fulfillment of the 3 last Feasts or days.
1/7 Yom Teruah (the day know man could tell.only God)
10/7 Yom Kipper - Jugdment day
15/7 Succoth or the Feast of Tabernacles.
In Lev. 23 and 25 you can study these thing.
The last three fall feasts will be fulfilled after 6000 years in the Jubilee. Yom Kippur will fall the 10th day in the seventh Mount.
] And the LORD spake unto Moses in mount Sinai, saying,
 Speak unto the children of Israel, and say unto them, When ye come into the land which I give you, then shall the land keep a sabbath unto the LORD.
 Six years thou shalt sow thy field, and six years thou shalt prune thy vineyard, and gather in the fruit thereof;
 But in the seventh year shall be a sabbath of rest unto the land, a sabbath for the LORD: thou shalt neither sow thy field, nor prune thy vineyard.
 That which groweth of its own accord of thy harvest thou shalt not reap, neither gather the grapes of thy vine undressed: for it is a year of rest unto the land.
 And the sabbath of the land shall be meat for you; for thee, and for thy servant, and for thy maid, and for thy hired servant, and for thy stranger that sojourneth with thee,
 And for thy cattle, and for the beast that are in thy land, shall all the increase thereof be meat.
 And thou shalt number seven sabbaths of years unto thee, seven times seven years; and the space of the seven sabbaths of years shall be unto thee forty and nine years.
 Then shalt thou cause the trumpet of the jubile to sound on the tenth day of the seventh month, in the day of atonement shall ye make the trumpet sound throughout all your land.
 And ye shall hallow the fiftieth year, and proclaim liberty throughout all the land unto all the inhabitants thereof: it shall be a jubile unto you; and ye shall return every man unto his possession, and ye shall return every man unto his family.
 A jubile shall that fiftieth year be unto you: ye shall not sow, neither reap that which groweth of itself in it, nor gather the grapes in it of thy vine undressed.
 For it is the jubile; it shall be holy unto you: ye shall eat the increase thereof out of the field.
 In the year of this jubile ye shall return every man unto his possession
The very important day to watch for is the Yom Teruah. The Jews wer watching forthis moment when teh New Moon appeared over Jerusalem. Then they knew when Yom Kippur would fall 10 days later.
These 10 days were the days of awe.http://www.jewfaq.org/holiday3.htm
The ten days starting with Rosh Hashanah and ending with Yom Kippur are commonly known as the Days of Awe (Yamim Noraim) or the Days of Repentance. This is a time for serious introspection, a time to consider the sins of the previous year and repent before Yom Kippur.
One of the ongoing themes of the Days of Awe is the concept that G-d has "books" that he writes our names in, writing down who will live and who will die, who will have a good life and who will have a bad life, for the next year. These books are written in on Rosh Hashanah, but our actions during the Days of Awe can alter G-d's decree. The actions that change the decree are "teshuvah, tefilah and tzedakah," repentance, prayer, good deeds (usually, charity). These "books" are sealed on Yom Kippur. This concept of writing in books is the source of the common greeting during this time is "May you be inscribed and sealed for a good year."
We do not know the day and hour before the NEW MOON tells us.
In the millennium all people have to do this:
For as the new heavens and the new earth, which I will make, shall remain before me, saith the LORD, so shall your seed and your name remain.
 And it shall come to pass, that from one NEW MOON to another, and from ONE SABBATH TO ANOTHER, shall all flesh come to worship before me, saith the LORD.
Because of this very false apostle Paul the replacement theology has destroyed Gods wonderful teaching in OT.