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Five Seasons Calendar is a proposed Standard Year by Stavros Daliakopoulos, Greece.
The proposal consists of four large periods of 84 days and one small period of 28 days, i.e. 12 weeks and 4 weeks, respectively.
The seven-day week cycle is preserved but there are no more months.
Mon | Tue | Wed | Thu | Fri | Sat | Sun |
---|---|---|---|---|---|---|
01 | 02 | 03 | 04 | 05 | 06 | 07 |
08 | 09 | 10 | 11 | 12 | 13 | 14 |
15 | 16 | 17 | 18 | 19 | 20 | 21 |
22 | 23 | 24 | 25 | 26 | 27 | 28 |
29 | 30 | 31 | 32 | 33 | 34 | 35 |
36 | 37 | 38 | 39 | 40 | 41 | 42 |
43 | 44 | 45 | 46 | 47 | 48 | 49 |
50 | 51 | 52 | 53 | 54 | 55 | 56 |
57 | 58 | 59 | 60 | 61 | 62 | 63 |
64 | 65 | 66 | 67 | 68 | 69 | 70 |
71 | 72 | 73 | 74 | 75 | 76 | 77 |
78 | 79 | 80 | 81 | 82 | 83 | 84 |
Mon | Tue | Wed | Thu | Fri | Sat | Sun |
---|---|---|---|---|---|---|
01 | 02 | 03 | 04 | 05 | 06 | 07 |
08 | 09 | 10 | 11 | 12 | 13 | 14 |
15 | 16 | 17 | 18 | 19 | 20 | 21 |
22 | 23 | 24 | 25 | 26 | 27 | 28 |
29 | 30 | 31 | 32 | 33 | 34 | 35 |
36 | 37 | 38 | 39 | 40 | 41 | 42 |
43 | 44 | 45 | 46 | 47 | 48 | 49 |
50 | 51 | 52 | 53 | 54 | 55 | 56 |
57 | 58 | 59 | 60 | 61 | 62 | 63 |
64 | 65 | 66 | 67 | 68 | 69 | 70 |
71 | 72 | 73 | 74 | 75 | 76 | 77 |
78 | 79 | 80 | 81 | 82 | 83 | 84 |
Mon | Tue | Wed | Thu | Fri | Sat | Sun |
---|---|---|---|---|---|---|
01 | 02 | 03 | 04 | 05 | 06 | 07 |
08 | 09 | 10 | 11 | 12 | 13 | 14 |
15 | 16 | 17 | 18 | 19 | 20 | 21 |
22 | 23 | 24 | 25 | 26 | 27 | 28 |
Mon | Tue | Wed | Thu | Fri | Sat | Sun |
---|---|---|---|---|---|---|
01 | 02 | 03 | 04 | 05 | 06 | 07 |
08 | 09 | 10 | 11 | 12 | 13 | 14 |
15 | 16 | 17 | 18 | 19 | 20 | 21 |
22 | 23 | 24 | 25 | 26 | 27 | 28 |
29 | 30 | 31 | 32 | 33 | 34 | 35 |
36 | 37 | 38 | 39 | 40 | 41 | 42 |
43 | 44 | 45 | 46 | 47 | 48 | 49 |
50 | 51 | 52 | 53 | 54 | 55 | 56 |
57 | 58 | 59 | 60 | 61 | 62 | 63 |
64 | 65 | 66 | 67 | 68 | 69 | 70 |
71 | 72 | 73 | 74 | 75 | 76 | 77 |
78 | 79 | 80 | 81 | 82 | 83 | 84 |
Mon | Tue | Wed | Thu | Fri | Sat | Sun |
---|---|---|---|---|---|---|
01 | 02 | 03 | 04 | 05 | 06 | 07 |
08 | 09 | 10 | 11 | 12 | 13 | 14 |
15 | 16 | 17 | 18 | 19 | 20 | 21 |
22 | 23 | 24 | 25 | 26 | 27 | 28 |
29 | 30 | 31 | 32 | 33 | 34 | 35 |
36 | 37 | 38 | 39 | 40 | 41 | 42 |
43 | 44 | 45 | 46 | 47 | 48 | 49 |
50 | 51 | 52 | 53 | 54 | 55 | 56 |
57 | 58 | 59 | 60 | 61 | 62 | 63 |
64 | 65 | 66 | 67 | 68 | 69 | 70 |
71 | 72 | 73 | 74 | 75 | 76 | 77 |
78 | 79 | 80 | 81 | 82 | 83 | 84: Double or triple Sunday |
To complete the 365-day cycle, the last Sunday of the year will be a "double" Sunday (DS), meaning it will have 48 hours instead of 24, so that the seven-day week is preserved. The same principle will apply for the leap years so we have a "triple" Sunday (TS) every 4 years that has 72 hours instead of 24.
Advantages[]
- No months to memorize
- No 13 months as other proposals
- The first weekday of the week is Monday as per ISO 8601
- No Friday the 13th days (only five 13s in the whole calendar)
- Each large period has 12 weeks
- One small period has 4 weeks
- Symmetrical (half year is 2 large and 1/2 small periods, or 182 days), so statistical comparisons are more accurate
- Quarterly statistics are also easier (91 days for each quarter although they intercept periods)
- Every day falls on the same weekday in each period (e.g. the 9th always falls on a Tuesday)
- Each large period can be divided by 2, 3, 4 and 6. The small period can be divided by 2 and 4.
- The calendar is the same every year (perennial), unlike the annual Gregorian calendar, which differs from year to year
- Scheduling is easier for institutions and industries with extended production cycles.
- Movable holidays would be able to have a fixed date while keeping their traditional weekday.
- The periods could be given historical names.
Disadvantages[]
- Birthdays, significant anniversaries, and other holidays would need to be recalculated as a result of a calendar reform, and would always be on the same day of the week
- Large day count in periods.
- Does not assign unique dates to the 364th, 365th (and 366th) days of a year.