1844 is 1260 on the Islamic calendar. What could be clearer?
The Christian calendar starts from the birth of Christ. The Umayyads came to power 666 years after the birth of Christ.
The day for a year approach is well established in Christianity. 3 1/2 years equals 42 months equals 1260 days.
It’s one of the clearest fulfilment of prophecy know.
I haven't gotten to all your references in this post yet, but I saw Tony response to this part of your post and have a comment. And that is, I don't see how the number is a date. It is a "number" or a "mark". If people don't get this mark on their forehead or hand, they can't buy or sell. It sounds very forced to have to add 5 years to a date to get 666. And like you said, the year of the birth of Christ is not known. It is only an estimate. An estimate that you say is 4-6 years. What if 4 years is the correct year that Jesus was born? Then, 4 plus 661 equals 665. So the number of the beast shall be 666 minus 1? And I could come up with an explanation. The Umayyads were probably thinking about taking over the year before they actually took over. So if you take 666 and account for the thought of taken over in the prior year, you get 665.
And, again, about the 1260. Baha'is have to manipulate what the prophecies are saying to make each one fit. The Two Witnesses do their thing for a certain amount of time, then they are killed and lay in the street a certain amount of time. What are those two amounts of time? And, should they be added together? Oh, I just glanced at the verses. They prophecy 1260 days, then are killed, and they lay in the street for 3 1/2 days. So, if a day is a year, then we have they prophesied 1260 years, then were killed. Then, they lay in the street 3 1/2 years.
But that doesn't add up to anything that Baha'is can use. So let's change the 3 1/2 days to years. How many days in 3 1/2 years? 1260 of course. But that is not 365 days in a year. That doesn't work. So let's use 360 days in a year. Now that we have 1260 days, that doesn't mean anything. So, let's change that to 1260 years. Now, we got something. Next, the Two witnesses prophecy 1260 years. They are killed and lay in the street another 1260 years. What? I give up. Let's do the Baha'i thing. Everything adds up to 1260 years. And everything starts with 621AD and goes to 1844. There, plain and day. What could be clearer?