Mars Sol Date
| Epoch | Confidence |
|---|---|
| 29 December 1873 CE +12:04:11 | High |
Overview
The Mars Sol Date, similar to the Julian Day Number, is the number of sols that have passed since the epoch. A sol is the name for the Martian day, and it is slightly longer than an Earth day. Currently I haven't been able to figure out exactly why the epoch was chosen. The day increments when the Airy-0 crater reaches midnight.
Info
One Mars sol is 39 minutes and 35 seconds longer than an Earth day.
Accuracy
This clock should be very accurate, though it relies on ΔT which ultimately is only an approximation.
Source
All of the information on this clock came from its Wikipedia article.