# How frequently do non-leap Februaries with only 4 weeks occur ?

Most months, including non-leap Februaries, require 5 weeks on the calendar. But a non-leap February that starts on a Sunday and ends on a Saturday can include all 28 dates in 4 weeks. How rare is that ? A friend says only once per 823 years. I say no way; such a happening occurs much more often.

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We add a Leap Day on February 29, almost every four years. The leap day is an extra, or intercalary, day and we add it to the shortest month of the year, February.
In the Gregorian calendar three criteria must be taken into account to identify leap years:

• The year can be evenly divided by 4;
• If the year can be evenly divided by 100, it is NOT a leap year, unless;
• The year is also evenly divisible by 400. Then it is a leap year.
This means that in the Gregorian calendar, the years 2000 and 2400 are leap years, while 1800, 1900, 2100, 2200, 2300 and 2500 are NOT leap years.

Posted on Jan 02, 2018

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Posted on Jan 02, 2017

SOURCE: to adjust time on a watch

If your watch has a crown that pulls out to set it pull crown out half a click. Then turn crown to set watch to proper dte.

Posted on Mar 01, 2008

Those dials are nonfunctional (decoration only), I too own one of these watches that I purchased from payless.

Posted on May 06, 2008

SOURCE: HOW DO I SET THE DATE

Find my tips here on FixYa and follow the link for CITIZEN watch manual. Click on Eco Drive watch and use INTERACTIVE settings. Everything is explained and shown there. Rate me, plz.

Posted on Feb 09, 2010

Check that the month is correct. April and July have a Sunday 11th.

Posted on Jun 23, 2010

Posted on Oct 26, 2010

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## Related Questions:

### WHEN was FIRST Leap-Year Recorded?

The National Maritime Museum has your answer: "The first leap year in the modern sense was 1752, when 11 days were 'lost' from the month September with the adoption of the Gregorian calendar by Britain and her colonies. After 1752 we adopted the system still in use today where an additional day is inserted in February in years wholly divisible by 4, other than years ending in 00 with the exception of those divisible by 400 which are still leap years (like 2000). This is certainly not the first use of leap years, the Julian calendar we used before 1752 had a simpler system of leap years, and remember, no calendar is universal."

Mar 07, 2017 | Watches

Tip

### Watch glossary: C (part1)

CABOCHON
Any kind of precious stone, such as sapphire, ruby or emerald, uncut and only polished, generally of a half-spherical shape, mainly used as an ornament of the winding crown or certain elements of the case.
CALENDAR, ANNUAL
An intermediate complication between a simple calendar and a perpetual calendar. This feature displays all the months with 30 or 31 days correctly, but needs a manual correction at the end of February. Generally, date, day of the week and month, or only day and month are displayed on the dial.
CALENDAR, FULL
Displaying date, day of the week and month on the dial, but needing a manual correction at the end of a month with less than 31 days. It is often combined with the moonphase.
CALENDAR, PERPETUAL
This is the most complex horology complication related to the calendar feature, as it indicates the date, day, month and leap year and does not need manual corrections until the year 2100 (when the leap year will be ignored).
CALIBER
Originally it indicated only the size of a movement, but now this indication defines a specific movement type and shape (e.g. round caliber) and combines it with the constructor's name and identification number. Therefore the caliber identifies the movement.
CANNON
An element in the shape of a hollow cylinder, sometimes also called pipe or bush, for instance the pipe of the hour wheel bearing the hour hand.
CARAT (KARAT)
Unit of gold fineness (and gemstone weight). Pure gold is 24k. 18k gold is 75% pure.
CAROUSEL
Device similar to the tourbillon, but with the carriage not driven by the fourth wheel, but by the third wheel.
CARRIAGE or TOURBILLON CARRIAGE
Rotating frame of a tourbillon device, carrying the balance and escapement. This structural element is essential for a perfect balance of the whole system and its stability, in spite of its reduced weight. As today's tourbillon carriages make a rotation per minute, errors of rate in the vertical position are eliminated. Because of the widespread use of transparent dials, carriages became elements of aesthetic attractiveness.
CASE
Container housing and protecting the movement, usually made up of three parts: middle, bezel, and back.
CENTER SECOND HAND, see sweep second hand.
CENTER-WHEEL
The minute wheel in a going-train.
CHAMPLEVé
Hand-made treatment of the dial or case surface. The pattern is obtained by hollowing a metal sheet with a graver and subsequently filling the hollows with enamel.
CHAPTER-RING
Hour-circle, i.e. the hour numerals arranged on a dial.
CHIME
Striking-work equipped with a set of bells that may be capable of playing a complete melody. A watch provided with such a feature is called chiming watch.
CHRONOGRAPH
A watch that includes a built-in stopwatch function, i.e. a timer that can be started and stopped to time an event. There are many variations of the chronograph.
CHRONOMETER
A high-precision watch. According to the Swiss law, a manufacture may put the word "chronometer" on a model only after each individual piece has passed a series of tests and obtained a running bulletin and a chronometer certificate by an acknowledged Swiss control authority, such as the COSC.
CIRCULAR GRAINING
Superficial decoration applied to bridges, rotors and pillar-plates in the shape of numerous slightly superposed small grains, obtained by using a plain cutter and abrasives. Also called Pearlage or Pearling.
CLASP
The attachment used to connect the two ends of the watch bracelet or strap around the wrist.
- Deployment Buckle - A three-folding enclosure, which secures the two ends of the bracelet and allows enough room for placing the watch on the wrist when fully deployed. When closed, the buckle covers the two-piece folding mechanism
- Hook Lock - Two separate units each fitting on either end of the bracelet which allows the watch to be laid out. One end of the closure hooks onto the other to secure the two ends of the bracelet.
- Jeweler's Clasp - A closure that is generally used on better bracelets. Also allows it to lie flat.
- Sliding Clasp - Also a hook type method but allows for easy sizing of the bracelet by sliding up.
- Twist Lock - A closure similar to Jeweler's Clasp used on ladies jewelry bracelets.
CLOISONNé
A kind of enamel work - mainly used for the decoration of dials - in which the outlines of the drawing are formed by thin metal wires. The colored enamel fills the hollows formed in this way. After oven firing, the surface is smoothed until the gold threads appear again.
CLOUS DE PARIS
Decoration of metal parts characterized by numerous small pyramids.

on Jan 11, 2010 | Watches

### Is there any way that I can set my Seiko perpetual calendar watch at home?

What a great watch! It has a super-fine piezo-electronic motor to move the date wheel! Very cool. Its quite a show to go through the date/leap-year check, and then observe the watch catch back up to the correct time afterwards. Battery lasts ~five years.
I downloaded the manual (your model number on watch back) after a short search online (beware of trojans/viruses).
Setting after a battery replacement requires shorting certain pins inside the watch to set the leap-year, and date. The back unscrews, and may require the special watch-wrench, available online. I unscrewed mine VERY CAREFULLY with fine pliers, confirming that I was doing this in a clean, dust-free location. The instructions are quite specific, must be followed carefully to set up correctly. Have a fine wire jumper to set the leap-year. I learned this because I did not want to pay an inexperienced jeweler \$100 to replace the battery.

Oct 13, 2014 | Seiko Watches

### I replaced the battery. The watch started time from Jan. 1

You have to set the year, the month and the date. Then you set the time zone. After that you can set the local time. You may also have to set the Daylight Savings Time.
The watch has a built in calendar that may run from let's say January first 2000 to the year 2070 (just a guess). If you set the calendar correctly you do not have to adjust the date when a month has 30 days, or when it is a leap year.

Sep 27, 2013 | Casio GW330A G Shock Solar Atomic Watch

### My armani exchange watch doesnt have month on it just days. some months are only 30 and i am forced to set it up a day every other month and back the next. is there a solution?

there's nothing to be change in your watch. most of watch brands is like yours but there are some watch brand that are selling perpetual calendar watch that you don't have to change every end of the month or even in leap year. if you want that, just look for the "PERPETUAL CALENDAR". I hope i had been helped you.

Aug 02, 2011 | Giorgio Armani Watches

### How does its year calendar work?

The day at a glance calendar system used in this Orient watch, has been used in a number of watches over the past 40 years, perhaps most famously in the Wittnauer "2000" watch (which Orient actually made for Wittnauer under contract). Orient itself has used this system in a number of different styles of watches. Note that the daily date window is separate from the day of the week / month at a glance system; the date window is driven in traditional fashion by the movement.

The day/month at a glance system is based on a single disc inside the watch that is manually advanced by the user. If you look at the top of the watch, where the months are listed, you'll see little two-digit numbers. These represent different years--"04" refers to 2004, "11" to 2011, etc. To get the right days of the week at the bottom of the dial, you move the appropriate year under the current month. That will line up the days of the week--Monday, Tuesday, etc.--with their correct dates. You may see the same year repeated more than once on the upper part of the dial because the calendar has a specific pattern that can be replicated.

On older watches using this same system, the top pusher was used to adjust the date window, and a separate winding knob controlled movement of the year/monthly calendar disc. On this specific watch, which I have not handled in person, I cannot see a separate crown to adjust the date, and so I am guessing that you would pull out the set stem part-way to engage the disk setting mode. This would make sense because unlike the date window, where the date is always advanced, the year must move both backwards and forwards to align with all the months in a given year--you'll see that January and October are in the same place on the dial, for example.

If you're interested, here's an example of a vintage Orient that uses this same system for its calendar. Note how the monthly calendar and year/month alignment are flipped from the watch you asked about. Please note that I have no connection with this web site, make no endorsement as to the price being asked for this watch--but it has a nice picture of a classic Orient:

http://forums.watchuseek.com/f30/\$128-all-steel-orient-perpetual-calendar-xl-case-vintage-watch-526811.html

On a final note, you'll see a number of people refer to these as "perpetual calendar" watches. That's not accurate. The year / days of the week disc holds about 20 years of calendar information. After that, the disc is no longer accurate, though you can easily keep aligning the monthly calendar just be referring to a printed calendar and adjusting it that way. For a period of time (not sure if they still do it), Orient would accept older watches with this system and change out the old year/day wheel with a new one that went further into the future.

Jun 03, 2011 | Orient CEUAA002WW Wrist Watch

### Need an expert on the new minute repeater by campanola, sold one at the retail jewelry store i work at, gentleman wants step-by-step hands on instruction as to the minute repeater function as well as the...

in order to set the repeater chime you need to set the watch and the sub watch to the same time.

This watch has comes with crown in position 0 , if you pull it out one level it becomes position 1 and if you pull it out one more time it is position 2 .

There are 3 buttons on the watch also. The button directly above the crown is button A the button below the crown is button B and the button directly across the crown is button C.

To set time you must first pull out crown to position 2 when the small second hand is at 12 o'clock position and it is stopped.

The mode will also at this time go to 0 and the sub watch second hand( the long second hand with the sun on it ) will also go to 0.

At this time you can just move the crown to set the proper time to the main watch . Now if you press the B button to set the sub watch . Each time you press the B button it will advance one minute hold down the B button and will advance time faster.

Do this to set the sub watch time make sure you watch the am and pm to make sure you are getting the proper time of day.

if the sub watch second hand ( the long second hand) is not aligned to 12 oclock then press the A button keep pressing button or hold it down to go faster until it is aligned at the 12 oclock position

Now push crown in back to 0 position for your time for your watch and sub watch should be set.

Set leap year.
Pull crown to position 1
Press the B button to adjust leap year.
the leap year is set by how many years from the previous leap year it has been . So 2008 was the previous leap year so we will h ave to set leap year at year 2 . The hands of the leap year are connected to the month so you must hold down a and b button or just press the b button to get to year 2 .

once you do that your leap year should be set.

to set the Repeater ( this is a beep from the watch to tell you the time with sound) make sure crown is in 0 position and hold a button for a couple of seconds to activate Reapter.

you can press any other button to end the chime .

also to get to leap year view while crown is in 0 position hold down the b button for 2 seconds . Pushes any button to return to normal calendar.

Oct 16, 2010 | Citizen Campanola Perpetual Calendar...

### Can I set my Elgin watch for only 28 days this month, or does it only go to 31 days every month

Mechanical watch ... you will probably have to change it manually.

Electronic, it might change itself, if it knows it is February and if it knows the difference between leap and non-leap year.

You will know in the morning.

Be prepared to change it manually.

Thanks for your interest in FixYa.com

Mar 01, 2010 | Watches

### Don't know how to set my Patek Replica calendar

Most Likely they are non functioning. If there is little buttons on the sides of the case try and push them in with a pin. But most likely you are stuck with them the way that they are

Jan 01, 2009 | Bulova Watch

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