According to this timeline at the website http://www.erevmoshiach.org/EM/Timeline.asp "the resurrection of the Jewish Patriarchs who "sleep" in the Machpela cave in Hebron will be brought to life in early August 2005," which is early in the month of Av. (The Fast of Av 9 this year takes place on 8/14/2005.) This will be a false prophecy if August comes and goes and this does not take place.
Also according to the same timeline the initial revelation of the Moshiach (Messiah) will happen in December 2005 (Chanukah 5766) -- "This will occur via unique shooting stars and other celestial events." Please see the time line for other proposed happenings to see whether they are false if they don't take place when they are supposed to happen.
Of course, the real Moshiach (Messiah), our Lord Jesus Christ will not return to earth with all his saints and plant his feet on the Mt. of Olives until the end of the great tribulation period according to Zechariah 14 when all the nations are gathered against Jerusalem to battle. Please also see Matthew 24:21-31. So any other Moshiach appearing on earth before the Lord Jesus Christ's return would be a False Moshiach or a False Messiah.
Below is also another article called Moshiach's Golden Trumpet at http://www.erevmoshiach.org/EM/ErevMoshiach_Updates.aspThe boy "Eli said that when the time came to announce Moshiach's coming, his great-grandfather (in heaven) would tell the Rabbi's brother, who would in turn tell the Rabbi (of their local Chabad House), and the Rabbi would then blow a trumpet to announce Moshiach's coming." Please keep in mind though that we are not to be a consulter with a familiar spirit of the dead even if they claim to come from heaven nor are we to believe what they say. and this article indicates that the grandfather of this boy is in heaven so I don't see the dead grandfather of this boy telling the Rabbi's brother anything although a familiar spirit of the dead (demonic spirit that disguised itself to look like the grandfather and/or impersonated his voice) might. Below is the story:
"We are excited by the latest "update" from Eli for a number of reasons. First, a bit of background. As far back as last Sukkos (Feast of Tabernacles), Eli mentioned that his great-grandfather (who passed away when Eli's father was just a baby) had a "job" in shomayim (heaven). Along with him, the Rabbi of their local Chabad House, and that Rabbi's brother also had jobs. What are these jobs? Eli said that when the time came to announce Moshiach's coming, his great-grandfather would tell the Rabbi's brother, who would in turn tell the Rabbi, and the Rabbi would then blow a trumpet to announce Moshiach's coming. (Note: This shouldn't be confused with the shofar of Moshiach, mentioned in many sources, which is blown at the completion of the Messianic period.)"
"Over the past half a year, we periodically asked if this sounding of the trumpet was occuring yet, but Eli consistently said no. This week, however, we were excited to hear from Eli that Moshiach's trumpet is now being sounded! What is the intent of the trumpet? Eli told us it was to announce that Moshiach is "getting near" in the way that a king is announced as he approaches."
"Eli noted that it was not being blown by the Rabbi, but by Moshiach himself (we are not sure what this signifies exactly). He was asked if it was a silver trumpet or a gold trumpet, and Eli responded that it was gold. Interestingly, the trumpets mentioned in the Torah are specifically silver trumpets, which were blown by the Levites in the Holy Temple. However, in the Tosefta (ancient compendium of laws), it mentions golden trumpets being blown by the Kohanim (priests) on the day after the festival of Sukkos to call all the people to gather in the Holy Temple for Hakhel (the Torah-ordained gathering of the entire Jewish people to hear the King read from his Torah scroll)."
"Whether this trumpet is serving to call the Jewish people to Jerusalem, or whether it is announcing the approach of Moshiach (or perhaps both), it is surely another encouraging sign among many."
Deuteronomy 18:9 ¶When thou art come into the land which the LORD thy God giveth thee, thou shalt not learn to do after the abominations of those nations.
10 There shall not be found among you any one that maketh his son or his daughter to pass through the fire, or that useth divination, or an observer of times, or an enchanter, or a witch,11 Or a charmer, or a consulter with familiar spirits, or a wizard, or a necromancer.
12 For all that do these things are an abomination unto the LORD: and because of these abominations the LORD thy God doth drive them out from before thee.