Visibility of Luna and Lunar Crescent

AYY-LW-l;
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UDD-&tr(UtlM)
olr@ l[. UEircc.l d.rc dd tirc is lppllFi.Lly dju{.d @ pcad! lo
c.lcula& rhe Julih Dar. for 0E d.lc {d rhc ritu. For rlis calcularion inirially if
ihc nondr is Jmqry o! fcbnoy, it i! co id.Ed morh .mbq 13 or 14.
Esp@tiv€ly, ofthe ptwiou trd ad rh. t@ i! sle d.crcNed by l.
UW-WY-l
Thc nmbd ofeftry yd (likc ,E | 100, 1700 .rc) d[ ln. yd UYY
ir Fquicd lo t@6t for !mh6 of mhd rap y@.
Stcp4: 1=INr(Wt00)
ln lml of 6e $tommic.l dlculariotu ! daL d and .na Fliday.
Octoba 15, 1582 is coaid.tld io b. I dlc of Grgodd caldd.r {d a darc toni
Thsdly, Octob* 4, l5E2 ..d prior to rhb datc i. coGiderd s a dale i! Jutie
cal€ndd. Ilru ifa dsl. i! fton Crc8ode cal.dde ndh.. EquiEs m accout
ofnon-tlap yed tom.mong3i 0F nomal lcap yds due to th€ modified rule
ofliad y.rinthe Grc8onlr qal.nd$(y.$divisible by 100 but rot diviribte
by 400 e @r L@! yes).
d"@ledq it casdtb'
I
a=2-/t+rMf(1/1)
.l*1I "@Ldo i.t IdlM"
( B_0 J
47