It would appear that the following information was the sign the Christians were looking for in order to flee Jerusalem in 66CE; WikiPedia "The Great Revolt began in the year 66 CE, originating in the Roman and Jewish religious tensions. The crisis escalated due to anti-taxation protests and attacks upon Roman citizens.[3] The Romans responded by plundering the Jewish Temple and executing up to 6,000 Jews in Jerusalem, prompting a full-scale rebellion. The Roman military garrison of Judaea was quickly overrun by rebels, while the pro-Roman king Agrippa II, together with Roman officials, fled Jerusalem. As it became clear the rebellion was getting out of control, Cestius Gallus, the legate of Syria, brought in the Syrian army, based on Legion XII Fulminata and reinforced by auxiliary troops, to restore order and quell the revolt. Despite initial advances and conquest of Jaffa, the Syrian Legion was ambushed and defeated by Jewish rebels at the Battle of Beth Horon with 6,000 Romans massacred and the Legion's aquila lost – a result that shocked the Roman leadership." Jewish War Timeline "May 66AD The Roman Procurator Florus demands 17 talents from the Jewish Temple treasury. This is the triggering insult for the Jews to begin their revolt. The Roman garrison in Jerusalem is overrun by rebels, who take control of the city. The rebels cause cessation of all sacrifices to the Roman Emperor, thus challenging Rome head-on." Therefore when Rome plundered the temple in 66CE and killing 6,000 jews, this would have been the moment followers of Christ would have seen to match his words at Mth 24, along with the sacrifices being ceased for the Roman people at that moment as well. WikiPedia "According to Josephus, the violence which began at Caesarea in 66 was provoked by Greeks of a certain merchant house sacrificing birds in front of a local synagogue.[18] The Roman garrison did not intervene and the long-standing Hellenistic and Jewish religious tensions took a downward spiral. In reaction, one of the Jewish Temple clerks Eliezar ben Hanania ceased prayers and sacrifices for the Roman Emperor at the Temple." WikiPedia "According to fourth-century church fathers Eusebius and Epiphanius, the Jerusalem Jewish Christians were able to flee to Pella before the beginning of the war. [21] (see: Flight to Pella)" WikiPedia "Gessius Florus; Upon taking office in Caesarea, Florus began a practice of favoring the local Greek population of the city over the Jewish population. The local Greek population noticed Florus' policies and took advantage of the circumstances to denigrate the local Jewish population. One notable instance of provocation occurred while the Jews were worshiping at their local synagogue and a Hellenist sacrificed several birds on top of an earthenware container at the entrance of the synagogue, an act that rendered the building ritually unclean. In response to this action, the Jews sent a group of men to petition Florus for redress. Despite accepting a payment of eight talents to hear the case, Florus refused to listen to the complaints and instead had the petitioners imprisoned." WikiPedia "According to Josephus, the violence which began at Caesarea in 66 was provoked by Greeks of a certain merchant house sacrificing birds in front of a local synagogue.[18] The Roman garrison did not intervene and the long-standing Hellenistic and Jewish religious tensions took a downward spiral. In reaction, one of the Jewish Temple clerks Eliezar ben Hanania ceased prayers and sacrifices for the Roman Emperor at the Temple. Protests over taxation joined the list of grievances and random attacks on Roman citizens and perceived 'traitors' occurred in Jerusalem.[citation needed] The Jewish Temple was then breached by Roman troops at the order of Roman governor Gessius Florus, having seventeen talents removed from the treasury of the Temple, claiming the money was for the Emperor. In response to this action, the city fell into unrest and some of the Jewish population began to openly mock Florus by passing a basket around to collect money as if Florus was poor.[19] Florus reacted to the unrest by sending soldiers into Jerusalem the next day to raid the city and arrest a number of the city leaders, who were later whipped and crucified, despite many of them being Roman citizens.[20] Shortly, outraged Judean nationalist factions took up arms and the Roman military garrison of Jerusalem was quickly overrun by rebels. Fearing the worst, the pro-Roman king Agrippa II and his sister Berenice fled Jerusalem to Galilee. Judean militias later moved upon Roman citizens of Judaea and pro-Roman officials, cleansing the country of any Roman symbols. According to fourth-century church fathers Eusebius and Epiphanius, the Jerusalem Jewish Christians were able to flee to Pella before the beginning of the war. [21] (see: Flight to Pella)"
Dan 12:11 along with Rev 11:1 are prophecies ultimately to be fulfilled in the time of the end. The events during the Maccabees revolt and the Roman/Jewish war were types, or examples of future events. It should not be understood that these two events are 1:1 with the final 1290 days in the time of the end. Ultimately prophecy is written to assist Christs brothers, and in return those with them. As posted above, in 66CE Christians in the first century would have recognized Christs words fulfilled in the events that began the Jewish revolt, in that of the sacrifices being ceased for the Roman people, and subsequently Rome retaliating by plundering the temple. These events were the beginning of the 1290 day period, as we know it wasn't until 70CE that Jerusalem was destroyed. Through this latest research, I have a lot more respect for those who have said that all of Jerusalem could have been the holy place, rather then just the first enclosure within the temple itself. Reason being, there doesn't seem to be clear cut evidence to what moment is considered to be the disgusting thing in the holy place in 70CE. Was it the moment the first wall was taken, the second wall, the temple burned? If it is the city itself, was it the moment the city was attacked? Therefore this makes narrowing down exact days very difficult. The only real source we have for written chronology and events of the Jewish War is Josephus, and his chronology leaves some room for error. Not only does he contradict himself on occasion, he tends to be bias in his representing events. Josephus was involved with infighting as part of an internal civil war within the walls of Jerusalem while also being surrounded by Roman armies. So in such a case the exact months of events vary as to when these events occur depending on the commentators in our day. In reality, as close as we can really get to understanding when an event occurred is the time of the year, as an example spring, summer, fall... With that said, if we use the fall season for the beginning of the revolt and the sacrifices ceasing in 66CE as described HERE, and we use the spring of 70CE as the disgusting thing entering the holy place as described HERE then we can come up with 1290 days in between these events. Ultimately in 66CE it was most important for the early Christians to flee once they saw the sacrifices being ceased and the temple plundered, and the exact days until the destruction of the city would not have been as important for they would have been gone by then. In fact Josephus instructs us that there was a migration in 66CE out of Jerusalem of Christians after these events known as the "Flight to Pella". SOURCE "[c. November 66] After this calamity had befallen Cestius, many of the most eminent of the Jews swam away from the city... Jewish War 2:20:1" It should be obvious with the evidence left to us by historians, and the evidence in scripture that prophecy, including the 1290 days, are ultimately meant to aid Christs brothers in the time of the end, in order that they may have an exact day count between events in order to present to the world the coming destruction, and as well gather back together Christs brothers along with the others with them in order to prepare the way for the coming of our Lord.