Gregorian calendar

The Gregorian calendar is the current calendar for the people of Earth and Luna, and still the most widely-used system of timekeeping among humanity. The other two competing systems are the Helios Calendar and the Arean calendar, as a standard timekeeping measure and a timekeeping system for Mars, respectively.

• Solar Storms Calendar Converter

Modifications

Only a few changes to the Gregorian calendar have been made, none of which have any significant impact on the setting.

• Leap-seconds have been dropped from the calendar. Instead, an offset is maintained and applied where needed around the globe.
• Every 4,000 years is considered to be a skip year, where a leap year is not counted, in order to bring the calendar closer in line with the mean tropical year.

Future Plans

These changes are expected by many to be the last of a purely Earth based calendar system. The rising popularity of the Helios Calendar, the slow diaspora of humankind, combined with the nearly unworkable problem of keeping the calendar truly intact leads many to expect that it will be left to die, likely along with the Arean calendar, in twenty thousand years or so.