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Il Ticino
e il Mondo |
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CAL13 FIXED CALENDAR
perennial calendar
13 months of 28 days each
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Ita,
Eng,
Fra,
Esp |
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Sunday |
Monday |
Tuesday |
Wednesday |
Thursday |
Friday |
Saturday |
Sunday |
Monday |
Tuesday |
Wednesday |
Thursday |
Friday |
Saturday |
Sunday |
Monday |
Tuesday |
Wednesday |
Thursday |
Friday |
Saturday |
Sunday |
Monday |
Tuesday |
Wednesday |
Thursday |
Friday |
Saturday |
|
days |

M01 |

M02 |

M03 |

M04 |

M05 |

M06 |

M07 |

M08 |

M09 |

M10 |

M11 |

M12 |

M13 |
D1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
D2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
D3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
D4 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
D5 |
5 |
5 |
5 |
5 |
5 |
5 |
5 |
5 |
5 |
5 |
5 |
5 |
5 |
D6 |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
D7 |
7 |
7 |
7 |
1/4 |
7 |
7 |
7 |
7 |
7 |
7 |
7 |
7 |
7 |
D1 |
8 |
8 |
8 |
8 |
8 |
8 |
8 |
8 |
8 |
8 |
8 |
8 |
8 |
D2 |
9 |
9 |
9 |
9 |
9 |
9 |
9 |
9 |
9 |
9 |
9 |
9 |
9 |
D3 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
D4 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
D5 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
D6 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
D7 |
14 |
14 |
14 |
14 |
14 |
14 |
1/2 |
14 |
14 |
14 |
14 |
14 |
14 |
D1 |
15 |
15 |
15 |
15 |
15 |
15 |
15 |
15 |
15 |
15 |
15 |
15 |
15 |
D2 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
D3 |
17 |
17 |
17 |
17 |
17 |
17 |
17 |
17 |
17 |
17 |
17 |
17 |
17 |
D4 |
18 |
18 |
18 |
18 |
18 |
18 |
18 |
18 |
18 |
18 |
18 |
18 |
18 |
D5 |
19 |
19 |
19 |
19 |
19 |
19 |
19 |
19 |
19 |
19 |
19 |
19 |
19 |
D6 |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
D7 |
21 |
21 |
21 |
21 |
21 |
21 |
21 |
21 |
21 |
3/4 |
21 |
21 |
21 |
D1 |
22 |
22 |
22 |
22 |
22 |
22 |
22 |
22 |
22 |
22 |
22 |
22 |
22 |
D2 |
23 |
23 |
23 |
23 |
23 |
23 |
23 |
23 |
23 |
23 |
23 |
23 |
23 |
D3 |
24 |
24 |
24 |
24 |
24 |
24 |
24 |
24 |
24 |
24 |
24 |
24 |
24 |
D4 |
25 |
25 |
25 |
25 |
25 |
25 |
25 |
25 |
25 |
25 |
25 |
25 |
25 |
D5 |
26 |
26 |
26 |
26 |
26 |
26 |
26 |
26 |
26 |
26 |
26 |
26 |
26 |
D6 |
27 |
27 |
27 |
27 |
27 |
27 |
27 |
27 |
27 |
27 |
27 |
27 |
27 |
D7 |
28 |
28 |
28 |
28 |
28 |
28 |
28 |
28 |
28 |
28 |
28 |
28 |
28 |
E1 |
extra day 1 |
29 |
E2 |
in
leap year : extra day 2 |
30 |
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All the years, months, weeks
and quarters begin with D1. A quarter = 13 weeks.
The extra days (holiday) do not belong to the weeks : after
the extra days begins the first week of the new
year.
Common year = 13 months of 28 days + 1 extra day = 52 weeks + 1 extra
day = 364 days + 1 extra day = 365 days.
Leap year = 13 months of 28 days + 2 extra days = 52 weeks + 2 extra
days = 364 days + 2 extra days = 366 days. |
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Date formats :
yyyy-Mmm-dd , or
Mmm-dd :
yyyy = year: -9999...9999,
mm = month: 01...13,
dd = day:
01...28 ;
examples : 2017-M05-21 , M05-21,
examples : 2015-M01-01 , M01-01,
extra days :
example E1 : 2018-M13-29 ,
example E2 : 2016-M13-30 ,
comparison Gregorian (
ISO ) < > CAL13
:
example : 2018-09-15 ( 15 Sept
2018 ) <=> 2018-M10-06 ( CAL13 )
example : 2020-02-29 ( 29 Feb
2020
) <=> 2020-M03-04
( CAL13 )
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Week dates :
yyyy-Www-d , or yyyy-Www
:
yyyy = year: -9999... 9999, ww =
week: 01...52,
d = day:
1...7
example :
2026-W45-1
= 2026-M11-01 ,
example :
2020-W09
= 2020-M03-01..07 |
Ordinal dates :
yyyy-ddd :
yyyy = year: -9999... 9999,
ddd = day:
001...366 ;
example : 2017-365 = 2017-M13-29 ,
example : 2018-091 =
2018-M04-07 ( last day of the first quarter ) |
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CAL13
calendar
Leap year
ISO 8601, (
mathematics of the ISO 8601 calendar ) |
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