Two Chronology Questions We Deliberately Don't Calculate
BibleCalcs builds evenhanded comparisons for prophecy and chronology questions where the real positions can be sourced and presented fairly — like Daniel's 70 Weeks, the date of the crucifixion, and the date of the Exodus. Two closely related questions don't get that treatment here — not because we haven't looked into them, but because the disagreement runs deeper than "which date," all the way down to whether a specific date is even the right kind of answer to give. Here's exactly why, for each.
The date of creation
Archbishop James Ussher's famous calculation — creation in 4004 BC — is the best-known attempt to date creation from the Bible's genealogies, but it was never the only one, and the others don't agree with it or each other. Using essentially the same method (tracing the "begat" genealogies in Genesis and the reign-lengths of later kings), other serious chronologists reached meaningfully different dates: the 2nd-century rabbi Jose ben Halafta calculated 3761 BC (the basis of the traditional Hebrew calendar's epoch), the Venerable Bede calculated 3952 BC, Joseph Scaliger calculated 3949 BC, John Lightfoot calculated 3929 BC, Johannes Kepler calculated 3992 BC, and Isaac Newton's own estimate came in around 4000 BC. That's a spread of roughly 250 years among careful scholars using the same basic approach and the same biblical text — before even touching the much larger disagreement between young-earth and old-earth Christians about whether the Genesis genealogies were ever intended to support a precise calendar date at all, as opposed to a theological or literary purpose. A calculator that output one number would misrepresent all of this as more settled than it is.
The end-times timeline
Unlike Daniel's 70 Weeks — which is one specific, bounded passage where each tradition's reading can be laid out side by side — "the end-times timeline" isn't one question but a whole stack of separate, independently-disputed questions, and Christians who hold the Bible in equally high regard land on different combinations of answers to each layer. Is there a future 7-year tribulation at all, and if so, does the Second Coming happen before it (pretribulation), in the middle of it (midtribulation), after most of it (prewrath), or only at its very end (posttribulation)? Is the "thousand years" of Revelation 20 a literal future earthly reign of Christ (premillennial), a present spiritual reality already underway (amillennial), or a golden age the church itself brings about before Christ returns (postmillennial)? Do Revelation's seals, trumpets, and bowls describe one sequence of future events in order, or the same period described three separate times from different angles? Each of those questions has its own multi-way split, sourced to real, serious theologians on every side, and they combine into dozens of internally-consistent but mutually incompatible overall timelines — not two or three camps the way the crucifixion date or the Exodus date does. There's no way to build a single evenhanded comparison tool here without either arbitrarily picking a handful of the most common combinations (and implicitly ruling out the rest) or building something so sprawling it stops being usable. We'd rather say that plainly than force it into a format that doesn't fit.
Frequently asked questions
Will BibleCalcs ever build something for these?
Possibly, if a genuinely fair, usable format presents itself — but not a single-answer calculator, and not by picking a "most common" view and presenting it as the answer. If you have an idea for how this could be done well, let us know.
Why is this different from the 70 Weeks or Exodus-date pages?
Those pages compare a small, countable number of real positions (three to five), each of which can be summarized fairly in a few sentences with real sources. Creation's date has that same shape in theory but a much wider spread of specific numbers with no natural "leading two or three"; the end-times timeline doesn't have that shape at all — it's several stacked, independent disagreements rather than one question with a few answers.
Does "too complex to calculate" mean the Bible is unclear or unreliable?
No — it means careful, faithful readers have disagreed on these specific questions for centuries, which is a fact about the history of interpretation, not a verdict on Scripture itself. Plenty of biblical chronology is straightforward enough to calculate confidently, which is exactly what the rest of this site's calculators do.
Explore the whole Calcs family here.
Let us know — we're open to it if the format is genuinely fair.
Let us know and we'll consider adding it.