Sunlit Design > InfoSearch > Years A.D. & B.C.
Index: A-D, E-R, S-Z
A
- Accuracy of Sundials
- A.D. Years
- Altitude, Solar
- Angle above Horizon, Solar
- Apparent Time
- "Astronomical Algorithms"
- Astronomical Calculations, Time Basis of
- Azimuth, Solar
- Daylight Saving Time
- Declination, Solar
- Degrees, Minutes and Seconds
- Degrees of Rotation
- Dynamical Time
Years A.D. & B.C.
Calculate it!
The Sun API represents years by a number between -4712 and 9999 corresponding to 4711BC to 9999AD.
The years B.C. are represented by negative numbers. They are counted in the following way:
| Year B.C./A.D. | Numeric Year |
| ... | ... |
| 3 BC | -2 |
| 2 BC | -1 |
| 1 BC | 0 |
| 1 AD | 1 |
| 2 AD | 2 |
| ... | ... |
Example
The year 465BC is represented as year -464