BC & AD Date Calculator

The BCE to CE Calculator can calculate the difference between any two dates in days, weeks, months and years.

Start Date:
End Date:

Using a calendar to work out the difference date to date can be difficult and time consuming. A B.C and A.D calculator is an automated program used to calculate the difference from a specified date to another. Date calculators use programming functions and formulas to calculate the time differences.

Information processed using our date calculator

  • B.C / B.C.E using Julian and proleptic Julian calendars
  • A.D / C.E using Gregorian and proleptic Gregorian calendars
  • Days, hours, minutes and seconds between two dates
  • Leap years are also considered in both Gregorian and Julian calendars
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Proofs and formulas are provided as references.