12Time since beginning of time
14Produce the date tuple of `[y=@ud m=@ud d=@ud]` of the year, month, and
15day from a number of days from the beginning of the Gregorian calendar.
19`day` is a an unsigned decimal.
23A cell of unsigned decimals.
30 ^- [y=@ud m=@ud d=@ud]
31 =+ [era=0 cet=0 lep=*?]
32 => .(era (div day era:yo), day (mod day era:yo))
34 ?: (lth day +(cet:yo))
36 => .(lep |, cet 1, day (sub day +(cet:yo)))
37 .(cet (add cet (div day cet:yo)), day (mod day cet:yo))
38 =+ yer=(add (mul 400 era) (mul 100 cet))
39 |- ^- [y=@ud m=@ud d=@ud]
40 =+ dis=?:(lep 366 365)
43 $(yer ner, day (sub day dis), lep =(0 (end 0 2 ner)))
44 |- ^- [y=@ud m=@ud d=@ud]
45 =+ [mot=0 cah=?:(lep moy:yo moh:yo)]
46 |- ^- [y=@ud m=@ud d=@ud]
50 $(mot +(mot), day (sub day zis))
70Days since beginning of time
72Inverse of `yall`, computes number of days A.D. from y/m/d date as the
73tuple `[yer=@ud mot=@ud day=@ud]`.
77`yer` is an unsigned decimal.
79`mon` is an unsigned decimal.
81`day` is an unsigned decimal.
91 |= [yer=@ud mot=@ud day=@ud]
93 => .(mot (dec mot), day (dec day))
97 =+ cah=?:((yelp yer) moy:yo moh:yo)
101 $(mot (dec mot), cah (slag 1 cah), day (add day (snag 0 cah)))
106 $(yer ney, day (add day ?:((yelp ney) 366 365)))
107 ?. =(0 (mod yer 100))
109 $(yer nef, day (add day ?:((yelp nef) 1.461 1.460)))
110 ?. =(0 (mod yer 400))
112 $(yer nec, day (add day ?:((yelp nec) 36.525 36.524)))
113 (add day (mul (div yer 400) (add 1 (mul 4 36.524))))
134Accept a parsed date of form `[[a=? y=@ud] m=@ud t=tarp]` and produce
135its `@d` representation.
153 (add 292.277.024.400 y.det)
154 (sub 292.277.024.400 (dec y.det))
155 =+ day=(yawn yer m.det d.t.det)
156 (yule day h.t.det m.t.det s.t.det f.t.det)
162 > (year [[a=%.y y=2.014] m=8 t=[d=4 h=20 m=4 s=57 f=~[0xd940]]])
163 0x8000000d227df4e9d940000000000000
171Produce a parsed daily time format from, `@d`, an atomic date.
189 =+ [muc=4 raw=(end 6 1 now)]
191 ?: |(=(0 raw) =(0 muc))
194 [(cut 4 [muc 1] raw) $(raw (end 4 muc raw))]
195 =+ day=(div sec day:yo)
196 => .(sec (mod sec day:yo))
197 =+ hor=(div sec hor:yo)
198 => .(sec (mod sec hor:yo))
199 =+ mit=(div sec mit:yo)
200 => .(sec (mod sec mit:yo))
201 [day hor mit sec fan]
207 > (yell ~2014.3.20..05.42.53..7456)
208 [d=106.751.991.820.094 h=5 m=42 s=53 f=~[0x7456]]
210 > (yell ~2014.6.9..19.09.40..8b66)
211 [d=106.751.991.820.175 h=19 m=9 s=40 f=~[0x8b66]]
214 [d=106.751.991.733.273 h=0 m=0 s=0 f=~]
222Determines whether a year contains an ISO 8601 leap-week. Produces a flag.
226`yer` is an unsigned decimal.
237 &(=(0 (mod yer 4)) |(!=(0 (mod yer 100)) =(0 (mod yer 400))))
261Produces a `date` from a `@d`.
265`now` is a time atom, `@d`.
279 :- ?: (gth y.ger 292.277.024.400)
280 [a=& y=(sub y.ger 292.277.024.400)]
281 [a=| y=+((sub 292.277.024.400 y.ger))]
282 [m.ger d.ger h.rip m.rip s.rip f.rip]
288 > (yore ~2014.6.6..21.09.15..0a16)
289 [[a=%.y y=2.014] m=6 t=[d=6 h=21 m=9 s=15 f=~[0xa16]]]
295Daily time to time atom
297Accepts a `tarp`, a parsed daily time, and produces a time atom,
325 (add (lsh 4 muc i.f.rip) $(f.rip t.f.rip))
326 (con (lsh 6 1 sec) fac)
333 > =murica (yell ~1776.7.4)
336 [d=106.751.991.733.273 h=0 m=0 s=0 f=~]
339 0x8000000b62aaf5800000000000000000
344 > `@da`(yule (yell ~2014.3.20..05.42.53..7456))
345 ~2014.3.20..05.42.53..7456
347 > `tarp`[31 12 30 0 ~]
348 [d=31 h=12 m=30 s=0 f=~]
350 > `@dr`(yule `tarp`[31 12 30 0 ~])
359Core whose arms contain constants for interacting with earth time.
372Derived by multiplying the number of days in a year
373(365) by the number of years in a century (100), then adding the number
374days from leap-years in a century (24).
395 > (sub (add 24 (mul 100 365)) cet:yo)
404The number of seconds in a day.
431The number of days in a 400-year period, arrived at by multiplying `cet` by four
432and adding one. This is done because every 400 years, there is a leap-year where
433there would otherwise not be.
451 > (sub era:yo (mul 4 cet:yo))
457A year is a leap-year if:
459- it's divisible by 4;
460- *unless* it's divisible by 100;
461- *or* if it's divisible by 400.
468The number of seconds in an hour. Derived by multiplying the number of
469seconds in a minute by the minutes in an hour.
494Maximum 64-bit timestamp
496This is the number of days (starting from 1970) that can be represented in a
49764-bit timestamp. Derived by multiplying `era:yo` by 730,692,561.
506 ++ jes 106.751.991.084.417
518The date is December 4, 292,277,026,596.
525The number of seconds in a minute.
549The days in each month of the Gregorian common year. A list of unsigned
550decimal atoms (Either 28, 30, or 31) denoting the number of days in the
551month at the year at that index.
560 ++ moh `(list @ud)`[31 28 31 30 31 30 31 31 30 31 30 31 ~]
567 ~[31 28 31 30 31 30 31 31 30 31 30 31]
576Days in months of leap-year
578The days in each month of the Gregorian leap-year. A list of unsigned
579decimal atoms (Either 29, 30, or 31) denoting the number of days in the
580month at the leap-year at that index.
589 ++ moy `(list @ud)`[31 29 31 30 31 30 31 31 30 31 30 31 ~]
596 ~[31 29 31 30 31 30 31 31 30 31 30 31]
607The number of seconds in four years. Derived by adding one second to the
608number of seconds in four years.
632The number of seconds in a year. Derived by multiplying the number of
633seconds in a day by 365.
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