Module: HankeHenryDate

Included in:
Date, DateTime
Defined in:
lib/hanke-henry/hanke_henry_date.rb

Overview

This module extends Date and DateTime classes to represent the Hanke-Henry calendar.

Defined Under Namespace

Modules: Module

Constant Summary collapse

XTR_YEARS = 
[
     4,   9,  15,  20,  26,  32,  37,  43,  48,  54,  60,  65,  71,  76,
    82,  88,  93,  99, 105, 111, 116, 122, 128, 133, 139, 144, 150, 156,
   161, 167, 172, 178, 184, 189, 195, 201, 207, 212, 218, 224, 229, 235,
   240, 246, 252, 257, 263, 268, 274, 280, 285, 291, 296, 303, 308, 314,
   320, 325, 331, 336, 342, 348, 353, 359, 364, 370, 376, 381, 387, 392,
   398
]
DAYS_SINCE_LAST_CYCLE =

A 400-year cycle runs from year 1 through 400, 401 through 800, and so on. N-th element in DAYS_SINCE_LAST_CYCLE is the number of days since the conclusion of the previous cycle at the beginning of the year N (mod 400). So, for day D, DAYS_SINCE_LAST_CYCLE.select {|d| d < D}.length indicates the year mod 400.

[
0, 364, 728, 1092, 1463, 1827, 2191, 2555, 2919, 3290, 3654, 4018, 4382, 4746,
5110, 5481, 5845, 6209, 6573, 6937, 7308, 7672, 8036, 8400, 8764, 9128, 9499,
9863, 10227, 10591, 10955, 11319, 11690, 12054, 12418, 12782, 13146, 13517,
13881, 14245, 14609, 14973, 15337, 15708, 16072, 16436, 16800, 17164, 17535,
17899, 18263, 18627, 18991, 19355, 19726, 20090, 20454, 20818, 21182, 21546,
21917, 22281, 22645, 23009, 23373, 23744, 24108, 24472, 24836, 25200, 25564,
25935, 26299, 26663, 27027, 27391, 27762, 28126, 28490, 28854, 29218, 29582,
29953, 30317, 30681, 31045, 31409, 31773, 32144, 32508, 32872, 33236, 33600,
33971, 34335, 34699, 35063, 35427, 35791, 36162, 36526, 36890, 37254, 37618,
37982, 38353, 38717, 39081, 39445, 39809, 40173, 40544, 40908, 41272, 41636,
42000, 42371, 42735, 43099, 43463, 43827, 44191, 44562, 44926, 45290, 45654,
46018, 46382, 46753, 47117, 47481, 47845, 48209, 48580, 48944, 49308, 49672,
50036, 50400, 50771, 51135, 51499, 51863, 52227, 52598, 52962, 53326, 53690,
54054, 54418, 54789, 55153, 55517, 55881, 56245, 56609, 56980, 57344, 57708,
58072, 58436, 58807, 59171, 59535, 59899, 60263, 60627, 60998, 61362, 61726,
62090, 62454, 62825, 63189, 63553, 63917, 64281, 64645, 65016, 65380, 65744,
66108, 66472, 66836, 67207, 67571, 67935, 68299, 68663, 69034, 69398, 69762,
70126, 70490, 70854, 71225, 71589, 71953, 72317, 72681, 73045, 73416, 73780,
74144, 74508, 74872, 75236, 75607, 75971, 76335, 76699, 77063, 77434, 77798,
78162, 78526, 78890, 79254, 79625, 79989, 80353, 80717, 81081, 81445, 81816,
82180, 82544, 82908, 83272, 83643, 84007, 84371, 84735, 85099, 85463, 85834,
86198, 86562, 86926, 87290, 87661, 88025, 88389, 88753, 89117, 89481, 89852,
90216, 90580, 90944, 91308, 91672, 92043, 92407, 92771, 93135, 93499, 93870,
94234, 94598, 94962, 95326, 95690, 96061, 96425, 96789, 97153, 97517, 97888,
98252, 98616, 98980, 99344, 99708, 100079, 100443, 100807, 101171, 101535,
101899, 102270, 102634, 102998, 103362, 103726, 104097, 104461, 104825, 105189,
105553, 105917, 106288, 106652, 107016, 107380, 107744, 108115, 108479, 108843,
109207, 109571, 109935, 110299, 110670, 111034, 111398, 111762, 112126, 112497,
112861, 113225, 113589, 113953, 114317, 114688, 115052, 115416, 115780, 116144,
116508, 116879, 117243, 117607, 117971, 118335, 118706, 119070, 119434, 119798,
120162, 120526, 120897, 121261, 121625, 121989, 122353, 122724, 123088, 123452,
123816, 124180, 124544, 124915, 125279, 125643, 126007, 126371, 126735, 127106,
127470, 127834, 128198, 128562, 128933, 129297, 129661, 130025, 130389, 130753,
131124, 131488, 131852, 132216, 132580, 132951, 133315, 133679, 134043, 134407,
134771, 135142, 135506, 135870, 136234, 136598, 136962, 137333, 137697, 138061,
138425, 138789, 139160, 139524, 139888, 140252, 140616, 140980, 141351, 141715,
142079, 142443, 142807, 143178, 143542, 143906, 144270, 144634, 144998, 145369,
145733
]
DAYS_IN_COMPLETE_CYCLE = 
400 * 364 + XTR_YEARS.length * 7
DAYS_SINCE_NEW_YEAR = 
[0, 30, 60, 91, 121, 151, 182, 212, 242, 273, 303, 333, 364]
HH_OFFSET =

Julian date for Jan 1, 1 (on H-H calendar)

1721423.5

Instance Method Summary collapse

Instance Method Details

#hh ⇒ Object

hh returns a string representation of the Hanke-Henry date.



170
171
172
 
# File 'lib/hanke-henry/hanke_henry_date.rb', line 170

def hh
  "%d-%0s-%0d" % _from_julian_date(self.jd)
end

#xtr? ⇒ Boolean

#xtr? returns true if the DateTime object falls in a Hanke-Henry year which contains the Xtr week.

Returns:

  • (Boolean) 


163
164
165
 
# File 'lib/hanke-henry/hanke_henry_date.rb', line 163

def xtr?
  XTR_YEARS.include?((_from_julian_date(self.jd)[0]) % 400)
end