On the Day of Origin, in the 3rd Month, on the 15th Year
Nehemiah made clear that he did not keep a calendar of his activities. His use of time and location was at the true God's discretion. The true God did not use calendars to mark how His prophets used their time. (God tells them how to spend their profits.) The Jewish calendar was followed with lunar observation that marked the days beginning and was noted on the months beginning and the sabbath. It did not include time.
Another example of this is in Ezekiel. Ezekiel by all appearances seems to be marking a calendar faithfully. In truth Ezekiel is not using a calendar in a chronological order between events. He does not articulate which calendar he is using, Jewish or Babylonian. When he uses a calendar entry for his first sentence of a verse the chapter exposes fornications and the award from the true God that those activities merit.
In short, using a calendar for prophecy is fornication which is idolatry. Of course, Satan is the mother of idolatry. The true God does not give dates. He watches people and events and delivers outcomes based on people and events. If people are repentant, like Nineveh the true God will reverse His anger and grant forgiveness based on repentant behaviour. (What future biblical event might we want to avoid?) Nineveh saved itself by listening to Jonah. If ten righteous men had been found in total between the cities of Sodom and Gomorrah those cities would have been spared. That is the clemency that Abraham had negotiated. One righteous person can save a world! Jonah was one person and Nineveh's world was saved.
To use a calendar to predict the dates and times of Biblical events is fodder for Satan to manufacture terrorism. Who takes hours and days and times in the Bible and turns them into prophetic dates? Satan does! Satan has no association at all with the true God nor the king and his heavenly kingdom. Meaning, Satan relies on humankind to derive times for her to act. Satan did do as y'all asked and built a Ba'al. This is why antichrist came first.
Satan eats the dust, literal meaning of the Bible, and has no knowledge of heavenly plans, other than what is written in the Bible. And an individual must have a relationship with the true God to understand the Bible. When a Bible "scholar" is building a case for what will happen in the future, especially at some time, this is Satan's time to shine and create her godlike proofs. (Hence one whack job zealot assonating Ferdinand to make the Watchtower wad look legit. They are legit, for Satan.)
A case in point. In the book of Job, we learn that God is suffering with Satan's presence. After Satan wars against those that learn from God's woman, Satan is abyssed. When God releases her from the abyss is when she is sent to the earth. She is still a spirit creature now. When Satan is released from the abyss, she profits as a whore, for a short time, riding a beast of her own making. Her own beast devoirs her in the end. That is when false religion, Babylon the Great is destroyed.
After God resurrected the Jesus, Satan proved her hatred of Christ's followers by martyring Christ's faithful. The remnant of apostles was brutally under attack. The book of Acts and the epistles attest to the atrocities not-to-mention the moral turpitude that infiltrated. John was in prison when he experienced the visions of Revelation. When John was receiving the visions is the key to understanding the times. John was under inspiration about what would be happening in the future when Christ was king of kings and lord of lords.
Centuries later from John's inspiration, Satan used the "visionary" understandings of a numerologist that exploited "biblical formulae," not yet understood by even the Pope, to pinpoint then prophesy that Satan would be cast down out of the heavens in the then future time, 1914. Congratulations on giving Satan the prophecy she needed to manufacture WWI to hide when she really is cast down to this earth, when she is released from the abyss. Not to mention, Watchtower, you missed that Satan was slaughtering the apostles of our modern first century. Right now, God is suffering that dragon's company whilst she is god of this world.