The Earth Calendar or Modified Gregorian Calendar is a proposed reform of the Gregorian Calendar developed and proposed by Brij Bhushan Vij, a fellow of the Metrology Society of India. The months are almost the same except that 31 July moves to 29 February. 31 December becomes a global holiday, called World Peace Day (WPD) as in the World Calendar, outside the week cycle, and Leap Day is 31 June, also outside the week cycle, which makes the calendar perpetual. Each year begins on a Monday and ends on a Sunday.
June has an extra day outside the week cycle at the end every 4 years except in the last of a cycle 128 years long. Therefore there are 31 leap days per cycle, 365+31/128 = 365.2421875 days per mean year, and a cycle contains 365*128+31 = 46751 days.
Seven 128-year cycles, i.e. 896 years, contain exactly 11082 lunations. This makes a mean lunation about 29.53049991 days long.
Alternately a leap week may be used instead of Leap Day and World Peace Day. Proposed leap week rules, all yielding 365.2421875 days per mean year, are
every sixth year a leap week is added and 29 more are spread across 21 cycles (i.e. 2688 years): 52 + 1/6 + 29/2688
every seventh year a leap week is added and 31 more are spread across 7 cycles (i.e. 896 years): 52 + 1/7 + 31/896
every eighth year a leap week is added and 47 more are spread across 7 cycles (i.e. 896 years): 52 + 1/8 + 47/896
Begin of Year
The year could start with the Northern winter solstice. The necessary shift was proposed to take place in the end of 2012 by omission of the last week of the year.
Leap Day, 31 June
United Nations Day, Sunday 30 September
World Peace Day, 31 December
Features and benefits
The calendar has 52 weeks (364-days) of 4 equal quarters (91-days or 13-weeks) if off-week days are not counted
There are no Fridays the 13th
It is perpetual - months and weekdays never change