The Serra Martin Calendar at a Glance

Notes:

1. The calendar is mistakenly based on the number of Martian sidereal days in a Martian year.

2. Option 1 is one of several Symmetric Gregorian Martian calendars, which generally have the following characteristics:

   • Divide the Martian year into 12 months, symmetrically stretched to encompass the longer Martian year.

   • Retain the seven-day week.

   • Begin the year near the Winter solstice

   • Place the leap day(s) in the second month.

   • Base the month names on the traditional Roman names

3. Other types of 12-month calendars are:

   • Asymmetric Gregorian Martian calendars

   • Asymmetric Zodiacal Martian calendars

   • Symmetric Zodiacal Martian calendars

4. Option 2 is similar in structure to the Darian calendar, but was developed independently. Differences are:

   • All months contain 28 days in leap years (672 days), and the 24th month contains 25 days in common years (669 days), which results in the mean astronomical year being a day too long.

   • Begins on the winter solstice.

   • The calendar is non-perpetual.

   • Uses an alternative system of month names.

5. Option 2 is one of several Symmetric Double Gregorian Martian calendars, which generally have the following characteristics:

   • Divide the Martian year into 12 months of approximately equal duration.

   • Retain the seven-day week.

   • Begin the year near the Winter solstice

   • Place the leap day(s) in the fourth month.

   • Base the month names on the traditional Roman names, plus some additional naming scheme

6. Other types of 24-month calendars are:

   • Asymmetric Vernal Equinox Martian calendars

   • Symmetric Summer Solstice Martian calendars

   • Symmetric Vernal Equinox Martian calendars

	Calendario en Marte Miguel Angel Serra Martín
	Mars Calendar Miguel Angel Serra Martín
	Option 1
	Option 2
	Martian Time
	Martian Time Survey 2.2