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Check your day + find the date of Easter day & Chinese New Year

"One thing you can't
recycle is wasted time"
Perpetual tables
Calculate it!
Chinese new year finder

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"
The day of the week...
Il giorno della settimana...

Easter falls on...
Pasqua cade il

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.

table datomatic 1
Table datomatic 2

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 m-1)/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 m-1)/5] + D + [D/4] + [C/4] - 2 x C
= 27 + [(13 x 11-1)/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 week-end!

Chinese New Year's Day Finder

Any Chinese year invariably begins with the second new-moon 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.



Chinese New Year calculator
This calculator will find for you the equivalent Chinese New Year for the Gregorian years 1901 to 2050 inclusive.

Enter a Year between
1901 and 2050
The Chinese New Year's day falls on...
is the first day of the year of the...
Previously it was the year of the...


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