Dagostinian astronomers have debated the typical Gregorian calendar and are unsettled with the varying days in months.  Several proposals have been made including 13 months of 28 days and 52 weeks of 7 days without any other divisions.  Neither of these systems easily address the extra day.  A system using 73 weeks of 5 days each was thrown out very early.  It was resolved that a calendar can only keep sacred weeks, months, or the solar cycle.  If weeks, then one must accept either 13 or no months.  If months, then one must accept unevenly distributed days and partial weeks.  If the solar year, then one must eschew perfect months and full weeks.

The decimal calendar is considered pointless.

Dagostinia has decided to honor the week as sacred, that is, any divisions will be of 7 day increments.  Therefore the proposal is as follows:

Four seasons, each of 13 weeks or 91 days was chosen.  This results in a 364 day year.  Since the sun and moon are not considered sacred, this allows timing to shift back and forth without regard to the heavenly bodies.  To rectify the 365.242 days, 11 extra weeks are added every 62 years.  Once the Dagostinian calendar falls at least 3 days behind the solar year, one week is added to the final season of the year making an occasional 371 day year.  The system is similar to the Gregorian leap year but with more 'wobble'.  While this system has a larger wobble than the Gregorian calendar, it is much less wobbly than the Jewish calendar with their extra month.

The formulas follow:

• • 365.242 days x 62 years = 22,645.004 days

  • 364 days x 62 years = 22,568 days

  • Δyear = 77.004 days

  • 11 weeks of 7 days = 77 days

  • Δday = 0.004 days ahead every 62 years

After 3934 years (or about 63 cycles), the Dagostinian calendar will be one day ahead.  We don't expect our culture or calendar to be around that long.

Extra weeks are added in years 3, 9, 14, 20, 25, 31, 37, 42, 48, 54, and 59.  A new cycle begins after year 62.

This system is similar to, but derived independently from other weekly calendars.  Colligan's Pax calendar is the most similar with the exception of his 13 months plus an extra occasional intercalary 7 day month.  Dagostinia's system keeps 4 seasons and appends the extra week to the fourth season.