Tags:
Perpetual calendar (Engl.), Calendario perpetuo (It.,
Sp., Port.),
Calendrier perpétuel (Fr.), Ewiger Kalender (Ger.),
Eeuwigdurende kalender (Du.),
Evighetskalender (Sw.), Kalendarz wieczny (Pol.),
věčný kalendář (Cz.),
Вечный календарь (Ru.), 万年历 (Chin.), 万年暦 (Jap.), सतत कैलेंडर (Hin.),
לוח עד (Hebr.), التقويم الدائم (Arab.)
Date
Finder 1 (javascript) 


Which
day of the week were you born on?
Find the day of the
week for any date... Fill in the date you want to check then
click "Get Date"
In
quale giorno della settimana sei nato?
Per sapere in quale
giorno della settimana cade una data basta compilare il modulo
e premere "Get Date"

Easter
falls on...
Pasqua
cade
il...
Year/Anno 







Perpetual
Calendar 2 (tables) 

By means of the tables below, you can determine
the day of the week for specific dates that might be of your
interest. Just follow the easy instructions. First, locate
the number at the intersection of the month
column and day row in the
table 1 (example: the column for June and the row for day
16th cross at the number 6). Then, locate the number at the
intersection of the year column and century
row in the table 2 (example: the column for year 77th
and the row for century 18th cross at the number 3). Finally,
locate in table 3 the letter at the intersection of both
numbers you've found (here, numbers 6 and 3 cross at D).
The letter D corresponds to Saturday (if the day of the week
you're looking for is in January or February of a leap year,
you have to bring forward of 1 day the result).
Per
trovare un giorno della settimana, cercate nella tabella
1 il numero segnato dall'incontro della colonna
dei mesi e della linea dei
giorni; poi, nella tabella 2, il numero all'incrocio
della colonna degli anni e
della linea dei secoli...
Infine, nella tabella 3, la lettera che si trova all'incontro
delle due linee contrassegnate dai numeri che avete trovato.
Ogni lettera corrisponde ad un giorno. 



Perpetual
Calendar 3 (calculate it!) 
The
following formula  named Zeller's Rule 
allows you to calculate a day of the week for any date:
F
= k + [(13 x m1)/5] + D + [D/4] + [C/4]  2 x C 
k is
the day of the month. Let's use January 27, 2024 as an example.
For this date, k = 27.
m is the
month number. Months have to be counted specially: March is
1, April is 2, and so on to February, which is 12 (this makes
the formula simpler, because on leap years February 29 is counted
as the last day of the year). Because of this rule, January and February are
always counted as the 11th and 12th months of
the previous year. In our example, m = 11.
D is the
last two digits of the year. Because of the month numbering,
D = 23 in our example, even though we are using a date from
2024.
C stands
for century: it's the first two digits of the year. In our
case, C = 20.
Now
let's substitute our example numbers into the formula:
F = k + [(13 x m1)/5] + D + [D/4] + [C/4]  2 x C
= 27 + [(13 x 111)/5] + 23 + [23/4] + [20/4]  2 x 20
= 27 + [28.4] + 23 + [5.75]
+ [5]  40
[dropp every number after the decimal
point]
= 27 + 28 + 23 + 5 + 5  40 = 48.
Once we have found F, we divide it by 7 and take the remainder
(if the remainder is negative, add 7). A remainder of 0 corresponds
to Sunday, 1 means Monday, etc. For our example, 48 / 7 =
6, remainder 6, so January 27, 2024 will be a Saturday. Then,
have a nice weekend!


Chinese
New Year's Day Finder 

Any Chinese year invariably begins with the
second newmoon day after the winter
solstice (December 21st). For instance, in the
year 2011, the next new moon after winter solstice was January
4th, and the second one was on February 3rd. Consequently,
this date corresponds to the Chinese New Year 2011.
However, the precise rules for determining the Chinese New
Year’s day are far more complex. One problem with any lunar
calendar system is that in some years there
are 13 new moons. The Chinese deal with this by slotting
in an extra intercalary month.
So, the Chinese New Year's day is movable — just as
Easter Day, which is also tributary of the moon — and
takes place somewhere between January 21 and February
20 according to astronomic circumstances.
The Chinese zodiac is a cycle of 12 years, each placed under
the sign of one of the twelve symbolic animals: Rat, Buffalo
(or Ox), Tiger, Cat (or Rabbit or Hare), Dragon, Snake, Horse,
Goat (or Sheep or Ram), Monkey, Rooster, Dog, Pig (or Boar).
Chinese years also evolve in cycles of ten years each. Every
set of two consecutive years is governed by a Chinese cosmic
element. There are five elements in all: Wood, Fire, Earth,
Metal, Water.




