Update: Brij Bhushan Vij implemented his DIVIDE SEVEN (7) PLAN to the Double Leap Calendar - Download the .pdf file here (Note the Calendar Cycle is 896 years exactly)

The blue numbers in the calendar are the numbering of weeks.

Jan	Apr	Jul	Oct	N	M	T	W	R	F	S
1	14	27	40	1	2	3	4	5	6	7
2	15	28	41	8	9	10	11	12	13	14
3	16	29	42	15	16	17	18	19	20	21
4	17	30	43	22	23	24	25	26	27	28
5	18	31	44	29	30
Feb	May	Aug	Nov			1	2	3	4	5
6	19	32	45	6	7	8	9	10	11	12
7	20	33	46	13	14	15	16	17	18	19
8	21	34	47	20	21	22	23	24	25	26
9	22	35	48	27	28	29	30
Mar	Jun	Sep	Dec					1	2	3
10	23	36	49	4	5	6	7	8	9	10
11	24	37	50	11	12	13	14	15	16	17
12	25	38	51	18	19	20	21	22	23	24
13	26	39	52	25	26	27	28	29	30	31
			Dec
1st Leap Week			53	32	33	34	35	36	37	38
2nd Leap Week			54	39	40	41	42	43	44	45
December either gets 1 Leap Week or 2 Leap Weeks (see Adjustments on how leap weeks are applied).

Features:

• 364 days
• 52 weeks
• 2,800-year period calendar (repeatable)
• Each month contains 30/31 days except for December which might have 31/38/45 days

Fixed holidays and special days:

• New Year's Day - Sun, Jan 1
• Valentine's Day - Mon, Feb 14
• Good Friday - Fri, Apr 6
• Easter Monday - Mon, Apr 9
• Helloween - Mon, Oct 30
• Christmas Eve - Sat, Dec 24
• Christmas Day - Sun, Dec 25
• New Year's Eve - Sat, Dec 31/38/45

ISO 8601 format for the days in the leap week: e.g. 2100-12-32

North America Daylight Saving Time (DST):
Begins on Sun, Mar 4 @ 2 AM & Ends on Sun, Oct 29 @ 2 AM (34 weeks from Week 10 to Week 43)

'Won't it be much easier to remember when to adjust your clocks?? It will always be Mar 4 and Oct 29!!'

Pros:

1. Lifelong calendar. Well...hopefully no major catastrophic events that would change the Earth's axis and causing it to tilt at a different angle, or a change in speed when rotating on its axis, or a change in speed when revolving around the Sun. Else, we will have to change the calendar again.
2. Complies with the 7-day cycle in the bible, respects the fourth of the Ten Commandments, and Sabbath. Quote from the bible (Genesis 2:2): 'On the seventh day God finished his work which he had made; and he rested on the seventh day from all his work which he had made.'
3. Equal financial quarters - ideal for businesses and governments. Consistent with university and high-school schedules.

Cons:

1. Complication in leaping days/weeks/months/years: A solar year is roughly 365.25 (The mean tropical/solar year in 2000 AD is 365.2422 SI days (see Tropical/Solar Year)). In order to account for the 1.25 days loss each year, one method is to use the above. Alternatively, we can add a 35-day leap month every 28 years (1.25 days/year * 28 years = 35 days). This method is not recommended as it disrupts the 12-month cycle, dramatically.
2. Friday the 13th appears every 3 months or 4 times per year (Oh come on, the world is not perfect!?). I mean, really, think about your worst days in your life, do they all fall on the Friday the 13th?? I think we'll get used to it, eventually.
3. For those who were born during the leap weeks, you'll have to celebrate on December 31.

© 2009-2016 Marcus W.