Other Uses of The Term "perpetual Calendar"
- Offices and retail establishments often display devices containing a set of elements to form all possible numbers from 1 through 31, as well as the names/abbreviations for the months and the days of the week, so as to show the current date for the convenience of people who might be signing and dating documents such as checks. Establishments that serve alcoholic beverages may use a variant that shows the current month and day, but 21 years in the past, indicating the latest legal birth date for alcohol purchases.
- Certain calendar reforms have been labeled perpetual calendars because their dates are fixed on the same weekdays every year. Examples are The World Calendar, the International Fixed Calendar and the Pax Calendar. Technically, these are perennial calendars. Their purpose, in part, is to eliminate the need for perpetual calendar tables, algorithms and computation devices.
- In watchmaking, "perpetual calendar" describes a calendar mechanism that correctly displays the date on the watch 'perpetually', taking into account the different lengths of the months as well as leap days. The internal mechanism will move the dial to the next day.
These meanings are beyond the scope of the remainder of this article.
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Famous quotes containing the words term, perpetual and/or calendar:
“Why did you give no hint that night
That quickly after the morrow’s dawn,
And calmly, as if indifferent quite,
You would close your term here, up and be gone”
—Thomas Hardy (1840–1928)
“Human life is thus only a perpetual illusion; men deceive and flatter each other. No one speaks of us in our presence as he does of us in our absence. Human society is founded on mutual deceit; few friendships would endure if each knew what his friend said of him in his absence, although he then spoke in sincerity and without passion.”
—Blaise Pascal (1623–1662)
“To divide one’s life by years is of course to tumble into a trap set by our own arithmetic. The calendar consents to carry on its dull wall-existence by the arbitrary timetables we have drawn up in consultation with those permanent commuters, Earth and Sun. But we, unlike trees, need grow no annual rings.”
—Clifton Fadiman (b. 1904)