The advantages of a uniform fiscal year and well synchronized fiscal and tax collection calendars are sufficiently great for Rhode Island municipalities to exert effort to secure them.

* There are some calendars that appear to be synchronized to the motion of Venus, such as some of the ancient Egyptian calendars ; synchronization to Venus appears to occur primarily in civilizations near the Equator.

In the modern world, written calendars are no longer an essential part of such systems, as the advent of accurate clocks has made it possible to record time independently of astronomical events.

The Hindu calendars are some of the most ancient calendars of the world.

The Chinese, Hebrew, Hindu, and Julian calendars are widely used for religious and / or social purposes.

Fiscal calendars are also used by businesses.

There are only 14 different calendars when Easter Sunday is not involved.

However, when Easter Sunday is included, there are 70 different calendars ( two for each date of Easter ).

Other formula-based calendars can have lengths which are further out of step with the solar cycle, for example, the Julian calendar has an average length of 365. 25 days, and the Hebrew calendar has an average length of 365. 2425

By the beginning of the Warring States, progress in astronomy and mathematics allowed the creation of calculated calendars ( where intercalary months and days are set by a rule, and not arbitrarily ).

The two oldest printed Chinese calendars are dated 877 and 882 ; they were found at the Buddhist pilgrimage site of Dunhuang ; Patricia Ebrey writes that it is no surprise that some of the earliest printed items were calendars, since the Chinese found it necessary to calculate and mark which days were auspicious and which were not.

* Day-by-Day calendars featuring the comic strip are available every year.

Traditional Chinese calendars, clocks, and compasses are based on the twelve Earthly Branches.

Easter and the holidays that are related to it are moveable feasts, in that they do not fall on a fixed date in the Gregorian or Julian calendars ( both of which follow the cycle of the sun and the seasons ).

The Hindu, Thai, Hebrew, Islamic, Tibetan, Mayan, Ani-yvnwiya ( Cherokee ), Neo-pagan, Germanic, Celtic, and the traditional Chinese calendars are all based on the phases of the Moon.

These are holidays that are not traditionally marked on calendars.

Since there are two different calendars currently in use among various Orthodox churches, two dates are listed: the first date is the date on the traditional Julian Calendar, the second date, after the slash, is the same day on the modern Gregorian Calendar:

Usually five epagomenal days are included within every year ( Egyptian, Coptic, Ethiopian and French Republican calendars ), but a sixth epagomenal day is intercalated every four years in some ( Coptic, Ethiopian and French Republican calendars ).

Other similar types of calendars can include computerized systems, which can be set to remind the user of upcoming events and appointments.

Strikingly similar folkloric aspects of the number 13 have been noted in various cultures around the world: one theory is that this is due to the cultures employing lunar-solar calendars ( there are approximately 12. 41 lunations per solar year, and hence 12 " true months " plus a smaller, and often portentous, thirteenth month ).

While the Jalali calendar is more accurate than the Gregorian, it is based on actual solar transit, similar to Hindu calendars, and requires an ephemeris for calculating dates.

The set of day signs used in central Mexico is identical to that used by Mixtecs, and to a lesser degree similar to those of other Mesoamerican calendars.

The Fasli, Qadimi and the Shahanshahi all ( notionally ) start each of the 30 day long months with the Sun entering a new constellation, similar to the Vedic ( Hindu ) Solar calendars as reflected in the Jyotisha ( Vedic Astrology ), and the Armenian calendar, but different from the Iranian ( Jalaali ) Calendar, the Julian Calendar, the Mayan Haab Calendar and the French Revolutionary Calendar, whose epochs of the months are fixed to the equinoxes / solstices, as are the signs of Western Astrology.

The Central Mexican calendar system is best known in the form that was used by the Aztecs, but similar calendars were used by the Mixtecs, Zapotecs, Tlapanecs, Otomi, Matlatzinca, Totonac, Huastecs, P ' urhépecha and at Teotihuacan.

Other companies such as Cadbury's who specialise in the making of calendars have similar stocks, if not higher.

Folios 13-21 contain the calendar, which is strikingly similar to psalter calendars produced in England in the same period.

The four group members were also visual artists, and using a printshop which was installed in their loft created their own Coctails ' line of merchandise, including buttons, calendars, t-shirts, news letters, and similar music giveaways.

The first half was always 15 days, the second half either 14 or 15 days on alternate months ( similar to Hindu calendars ).

An analysis of the fiscal tax collection year calendars throughout the state indicates that transition may not be as painful as is commonly thought.

It is also common to operate two calendars simultaneously, usually providing unrelated cycles, and the result may also be considered a more complex calendar.

Other marked bones may also represent lunar calendars.

Even where there is a commonly used calendar such as the Gregorian calendar, alternate calendars may also be used, such as a fiscal calendar or the astronomical year numbering system.

The astronomer's mean tropical year which is averaged over equinoxes and solstices is currently 365. 24219 days, slightly shorter than the average length of the year in most calendars, but the astronomer's value changes over time, so William Herschel's suggested correction to the Gregorian calendar may become unnecessary by the year 4000.

Consequently, the 1st century in these calendars may designate the years 0 to 99 as the 1st century, years 100 to 199 as the second etc.

The saint is assigned a feast day which may be celebrated anywhere within the Catholic Church, although it may or may not appear on the general calendar or local calendars as an obligatory feast, parish churches may be built in his or her honor, and the faithful may freely and without restriction celebrate and honor the saint.

Typical monthly calendars that include phases of the moon may be off by one day if intended for use in a different time zone.

Lunisolar calendars may require intercalations of both days and months.

Whether to insert an intercalary month in a given year may be determined using regular cycles such as the 19-year Metonic cycle ( Hebrew calendar and in the determination of Easter ) or using calculations of lunar phases ( Hindu lunisolar and Chinese calendars ).

They measured the moon's motion against the stars, so the 235: 19 relation may originally have referred to sidereal years, instead of tropical years as it has been used in various calendars.

The revision of the calendar in 1969 removed the mention of Saint Stephen I from the General Roman Calendar, but, according to the General Instruction of the Roman Missal, the 2 August Mass may now everywhere be that of Saint Stephen I, unless in some locality an obligatory celebration is assigned to that day, and some continue to use pre-1969 calendars that mention a commemoration of Saint Stephen I on that day.

Additionally, collaborative software may support project management functions, such as task assignments, time-managing deadlines, and shared calendars.

Additionally, collaborative software may support project management functions, such as task assignments, time-management with deadlines and shared calendars.

iTunes and its alternatives may also transfer photos, videos, games, contact information, e-mail settings, Web bookmarks, and calendars to iPod models supporting those features.

Lunisolar calendars may be regarded as solar calendars, although their dates additionally indicate the moon phase.

Artificial calendars may also have 30 days in February.

Easter Sunday may be as early as 22 March or as late as 25 April, and there are consequently 35 possible days on which it may fall ; each Dominical Letter allows five of these dates, so there are five possible calendars for each letter.