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 Appendix I.   Key Dates and Their Anniversaries The "Key Dates" addition to the Bible-calculator Specify a date of interest, and the new Key-Dates tool (lower right on the Bible-calculator) cycles through a table of significant dates (and their anniversaries in key years), generating a list of dayspans whose daycount-factors match the criteria selected:  be it one- or two-digit primes; key Biblical numbers (153, 276, etc); or a user-provided number. The concept of "key dates" There are certain events in God's timetable of history which He has allowed Bible students to pinpoint to exact days and years in our calendar. For instance, Jesus was crucified in the year 33 AD; the date was 4-1. Between 4-1-33 AD and 5-21-2011 AD (the end of the "latter rain":  another key date) there are 722,500 days (inclusive).  This breaks down to 10^2 x 5^2 x 17^2. By this we see that two "key dates" can be spaced apart at interesting intervals. Key-date anniversaries Between 4-1-33 AD and 7-17-2004 there are 720,000 days (10^4 x 2^3 x 3^2). Admittedly, 7-17-2004 does not seem to be a key date.  However, when treating "the seventh month, ... the seventeenth day of the month" (Genesis 8:4) as a literal date in our calendar, one can see 7-17-2004 as an "anniversary" of a key date which occurred in 4990 BC.  (For justification of literal interpretation of Flood "dates", see the study Seeking an Actual Date for the Flood on this website.) Is there any significance to this 720,000-day interval?  The start and end dates seem tied thematically:  the Crucifixion (God's wrath completed); and an anniversary of the day the flood waters were abated (again, God's wrath completed).  Further, notice that this falls in 2004, seven years before the final destruction of 2011.  It was in 2004 that Bible students first understood and began to spread news of the coming end in 2011, and this final seven-year span would seem to mirror the seven-days warning that God gave Noah before the Flood. Debates on the significance of this 720,000-day interval aside, it merely serves as an illustration of how to use the "Key Dates" portion of the Bible-calculator. What does it search for, and how? Enter any  [Month / Day / Year].   For example,  [ 3 / 5 / 1990 AD ] ``` > Computer constructs comparison table by combining Key Dates: 4/1, 4/3, 5/21, 9/7, etc. ...with Key Years: -11013, -4990, 33, 1988, 2011, etc. ...resulting in a table of Key Dates and their anniversaries in Key Years: 4/1/-11013, 4/1/-4990, 5/21/-4990, 2/17/2011, etc. > Computer checks for interesting dayspans between this table and [3/5/1990] AD > User selects search-criteria where dayspans are divisible by: --choose any or all-- 1) prime numbers from 0 - 100 2) non-primes of Biblical significance: {84, 100, 144, 153, 168, 276, 365, 666} 3) [user-specified number] ``` Here we see some typical results: The date [ 3/5/1990 ] is merely a random example.  Key dates, such as 5/21/2011 AD, can of course also be entered for analysis. Users can expand results by checking [x]"Patriarch / judge yrs".  This will add to the comparison table all the years of minor patriarchs & judges--  numerous years which may be of interest. The years of major patriarchs (Noah, Abraham, etc.) are always included. Numbers that are Cubic, Square, Fibonnacci*, and Triangular* are always part of the results.* These two number categories are included to provide a more thorough examination of possible mathematical significance. →Appendix II:  Significance (or Insignificance) of Results John O'Leary / Bible-calculator developer