Febraayo mararka qaarkood waxay leedahay qaab aan caadi ahayn oo soo jiidasho leh jadwalka. Tusaale ahaan, Febraayo 2021 qofku wuxuu la kulmi karaa daqiiqad noocaas ah, isagoo arkaya "February oo leydi qumman ah". Saamayntan dhifka ah waxay dhacdaa marka Febraayo ay leedahay \(28\) maalmood oo Febraayo 1-deeda ku beegan tahay Isniinta. Laakiin imisa jeer ayay tani dhab ahaantii dhacdaa iyo intee in le'eg ayaad sugaysaa wakhtiga xiga?
Febraayo si ay ugu muuqato "leydi qumman," waa in la buuxiyaa laba shuruudood:
- Waa in uu ahaado sanad aan boodayn, sidaa awgeed February waxa ay leedahay maalmo sax ah \(28\),
- 1-da Febraayo waa inay dhacdaa maalin Isniin ah.
Haddii labada shuruudood la buuxiyo, Feebarwari waxay si sax ah ugu habboon tahay shabagga \(4x7\) ee jadwalka, iyada oo aysan jirin maalmo bilo kale ka soo baxay isla usbuuca.:
Kalandarka \(14\) waxaa jira noocyo kalandareedka suurtagalka ah: todobo sano oo aan boodayn ( \(365\) maalmood) oo 1-da Janaayo ku beegan tahay maalin kala duwan oo toddobaadka ah iyo toddoba sannadaha boodboodka ( \(366\) maalmood) halkaasoo Janaayo 1deeda ay sidoo kale ku dhacdo maalin ka duwan toddobaadka.
Ka soo qaad in aynu u tilmaamno \(365\) maalinta kalandarka halkaas oo Janaayo 1 ay ku beegan tahay Isniinta sida \(A\) . Jadwalka uu sannadku ka bilaabmo maalinta Talaadada ah waa \(B\) , maalinta Arbacada waa \(C\) iyo wixii la mid ah ilaa laga gaaro \(G\) . Ka dib waxaan tixraacaynaa taariikhda \(366\) -maalintii ay Janaayo 1-deeda ku beegan tahay Isniinta sida \(1\) , Talaadadana waa \(2\) iyo wixii la mid ah. Tani waxay keenaysaa 14 kalandarka kala duwan ee soo socda:
- 365 maalmood: \(A, B, C, D, E, F, G\)
- 366 maalmood (leap years): \(1, 2, 3, 4, 5, 6, 7\)
Hadda Janaayo had iyo jeer waxay haysataa \(31\) maalmood, waxaana rabnaa Febraayo inay bilaabato Isniinta. Tani waxay ka dhigan tahay in Janaayo 31 ay tahay inay dhacdo Axad. Haddii Janaayo 24-keeda, 17-keeda, 10-keeda iyo 3-aad ay yihiin Axad, Janaayo 1-deeda waxay ku beegan tahay Jimce. Markaa waxaan raadineynaa kalandarka \(E\) . Jadwalka \(5\) lama isticmaali karo sababtoo ah kuwani waa sannado bood ah oo Febraayo ay leedahay \(29\) maalmood.
Jadwalku wuxuu raacayaa wareegga sanadka \(400\) . Waxaa wareeggan ku jira \(97\) sano oo leap ah, guud ahaanna wareegga waxaa ku jira \(146.097\) maalmood. Kadibna wareeggu mar kale ayuu bilaabmaa. In \(2001\) wareeg cusub bilaabay iyo January 1-deedii dhacay maalin Isniin ah. Sannadka caadiga ah \(365\) maalin, sanadka cusub wuxuu had iyo jeer bilaabmaa maalinta xigta ee toddobaadka marka loo eego sannadkii hore. Si kastaba ha ahaatee, sanadka boodboodka ka dib, sanadka cusub wuxuu bilaabmaa laba maalmood ka dib. Janaayo 1, 2001 waxay ahayd Isniin, 2002 Talaado, 2003 maalin Arbaco, 2004-tii Khamiis iyo 2005-tii maalin Sabti ah. Sannadaha qarniga ma jiraan sannado boodbood ah ilaa sannadka qarniga aan la qaybin karin \(400\) .
Taxanaha kalandarka ee ka badan \(400\) wareegga sanadka waa sida soo socota:
$$\displaylines{ABC4 \,\, FGA2 \,\, DEF7 \,\, BCD5 \,\, GAB3\\
EFG1 \,\, CDE6 \,\, ABC4 \,\, FGA2 \,\, DEF7\\
BCD5 \,\, GAB3 \,\, EFG1 \,\, CDE6 \,\, ABC4\\
FGA2 \,\, DEF7 \,\, BCD5 \,\, GAB3 \,\, EFG1\\
CDE6 \,\, ABC4 \,\, FGA2 \,\, DEF7 \,\, BCDE\\
FGA2 \,\, DEF7 \,\, BCD5 \,\, GAB3 \,\, EFG1\\
CDE6 \,\, ABC4 \,\, FGA2 \,\, DEF7 \,\, BCD5\\
GAB3 \,\, EFG1 \,\, CDE6 \,\, ABC4 \,\, FGA2\\
DEF7 \,\, BCD5 \,\, GAB3 \,\, EFG1 \,\, CDE6\\
ABC4 \,\, FGA2 \,\, DEF7 \,\, BCD5 \,\, GABC\\
DEF7 \,\, BCD5 \,\, GAB3 \,\, EFG1 \,\, CDE6\\
ABC4 \,\, FGA2 \,\, DEF7 \,\, BCD5 \,\, GAB3\\
EFG1 \,\, CDE6 \,\, ABC4 \,\, FGA2 \,\, DEF7\\
BCD5 \,\, GAB3 \,\, EFG1 \,\, CDE6 \,\, ABC4\\
FGA2 \,\, DEF7 \,\, BCD5 \,\, GAB3 \,\, EFGA\\
BCD5 \,\, GAB3 \,\, EFG1 \,\, CDE6 \,\, ABC4\\
FGA2 \,\, DEF7 \,\, BCD5 \,\, GAB3 \,\, EFG1\\
CDE6 \,\, ABC4 \,\, FGA2 \,\, DEF7 \,\, BCD5\\
GAB3 \,\, EFG1 \,\, CDE6 \,\, ABC4 \,\, FGA2\\
DEF7 \,\, BCD5 \,\, GAB3 \,\, EFG1 \,\, CDE6}$$
Hadda waxa kaliya ee ay tahay in aan sameyno waa tirinta inta jeer ee jadwalka \(E\) ka soo muuqdo taxanahan. Waxaa jira dhacdooyin \(43\):
$$\frac{43}{400} = \frac{10,75}{100} = 10,75\%$$
Feebarweri laba jibaaran yahay oo dhammaystiran waa ifafaale naadir ah oo kalandarka oo dhaca tobankii sanoba hal mar. Markaa marka xigta ee aad aragto jadwal leh labajibbaaran Febraayo, ogow inaad markhaati ka tahay waqti naadir ah oo qurux badan oo soo noqnoqda hal mar tobankii sano ama wax ka badan. Jid ahaan, wakhtiga xiga wuxuu dhici doonaa Febraayo 2027.