Sol

The average length of a Martian solar day (often called a sol) is 24h 39m 35s. This yields a conversion factor of 1.0274912510 days/sol. Thus Mars' solar day is only about 2.7% longer than Earth's.

As a resource, one sol is a unit of time. Time cannot be created or produced; all of us are given the same amount of time. So use it wisely! Go outside.