Days In Years

This form displays how many days are possible when a certain number of Biblical years are known. The number of days in a year average 364.8 days/year. But, exact years are never this length. This variance is because of leap year constraints.

The Bible Calendar, along with its structure, allows for a very clever day accurate interval prediction even though only bunches of years are mentioned. If you already have read the page, the following form is useful, otherwise read the full story below.

Days in Years Calculator
Enter number of years:
How many of these repeat?

Need Phil's attention.

Special Query -- Answer

Number of days in a set of years.

The first way this can be calculated is by figuring the total number of years and then calculating the number of days in those years. The following shows those steps.

  • years * = years.

  • DaysIn( years ) = days.

The second way this can be calculated is by figuring the number of days first and then figuring the total. The following shows it done this way.

  • DaysIn( years ) = days.

  • days * = days.

There are various cases when these two systems yield the same answer and cases when they yield different results. In this case the following happened:

  • The first result: days.

  • The second result: days.

  • For a difference of: days.

As Dates

We can render each of these day counts as dates. Rendered this way we are showing off the years and days implied by the day counts. This may, or may not, have anything to do with intended meaning in scripture. The following shows the results of this.

For the first calculation strategy above,
days as a date is:

  • //.

For the second calculation strategy above,
days as a date is:

  • //.

For a difference of

  • months.


Bunches of Years indicate days

By the way the Bible structures the text to indicate the number of years between events it is able to give very precise day count intervals that do not align with the annual calendar. The way it does this is through providing a year count and then a multiple.

  • The number of days in a year count are determined as though we were starting a new contract. "As a bond man would count them." Using an original biblical calendar starting at a new day-accurate epoch.

  • The number of such bundles of days are then multiplied out, rendering the total days in the interval.

Since years are not of regular length the result from this process is not the same as would be found through computing the full number of years first, and then computing the total number of days in those total years.

This difference in length means that the way years are bunched will determine the total number of days indicated with precision better than the total number of days in the total number of years simply through the bunching of those years in different ways.

Example of how this works.

Daniel is told there will be 70 weeks for his people Israel. The smaller number, the weeks provide the smaller bundle, the total number, 70 provides the multiple. If we work out the total number of days in a week, or in 7 years, we get 2550 days. 70 such bundles yields 2550 days * 70 = 178500 days.

This is not the number of days that would be implied if we took the number of days in 7 years * 70 = 490 years which is 178710. A difference of 210 days or seven full months.

This illustration implies that when years are bundled and then run out that there is the possibility that the total number of days implied in the interval are not even multiples of years.

Since we don’t know for sure if this was intended each case found in the Bible must be investigated to see what God may have meant. Second references must be used to confirm any results computed this way. This quirk of the calendar may explain the apparent lack of day references, they are there, just hidden away in this clever math.

Using the form

To use the form above, enter the number of years in the base and then enter the number of times this year count repeats. The program will run the math and give you the total number of days in the answer. It will also give the total number of days if the total years was taken instead.


  • In general the multiplier system that the Bible uses will cause the number of days to come up short of what we would get if we took the days in the total number of indicated years. In the example we are 210 days short.

  • If the base year count is fifty years (or a multiple there of) then the two systems provide the same answer. Consider: If Daniel’s weeks are meant to be weeks of Sabbath years, which makes Gabriel’s weeks a clever name for a Jubilee period then 70 weeks is the multiplier for the number of days in a Jubilee period of 50 years. There are 18240 days in a 50 year Jubilee cycle. So the total number of days in this interval are 18240 days * 70 = 1276800 days. We get the same number of days if we just take 50 years * 70 = 3500 years and then look up the days: 1276800 days.

Other interesting queries

This difference appears even in simple statements. The expression "seven times" which drives many prophetic intervals and is first found in Leviticus 26 has different answers based on how it is calculated.

  • Click here for a report on the expression "seven times."

Another place where this might be an issue is in Matthew chapter 1, where a generation is apparently multiplied by 14. If the process described on this page is any indication the results could be dramatically different depending on how this is computed.

  • Click here for a report on a 70 year long generation repeated 14 times.

  • Click here for a report on an 80 year long generation repeated 14 times.

  • Click here for a report on a 120 year long generation repeated 14 times.

There is a mysterious passage in Revelation which uses the same structure only this time seems to imply days instead of years. Run the following to see what that implies about time.

  • Click here for a report on the 144,000 of Revelation.