A leap week calendar is a calendar system with a whole number of weeks in a year, and with every year starting on the same weekday. Most leap week calendars...
4 KB (603 words) - 16:40, 26 April 2025
The ISO week date system is effectively a leap week calendar system that is part of the ISO 8601 date and time standard issued by the International Organization...
28 KB (3,384 words) - 11:06, 23 May 2025
A leap year (also known as an intercalary year or bissextile year) is a calendar year that contains an additional day (or, in the case of a lunisolar calendar...
46 KB (5,510 words) - 16:48, 14 July 2025
cycle has been a major concern raised against its adoption, various leap week calendars have been proposed as a solution. * The two special dates have been...
12 KB (1,431 words) - 00:09, 30 June 2025
(timekeeping) – Insertion of a leap day, week, or month ISO 8601 – International standards for dates and times ISO week date – Leap week calendar system Julian date –...
6 KB (790 words) - 21:00, 12 June 2025
observation-based leap seconds. ISO 8601, standard based on the Gregorian calendar, Coordinated Universal Time and ISO week date, a leap week calendar system used...
34 KB (921 words) - 13:20, 6 June 2025
Hanke–Henry Permanent Calendar (HHPC) is a proposal for calendar reform. It is one of many examples of leap week calendars, calendars that maintain synchronization...
22 KB (2,178 words) - 02:46, 22 June 2025
International Fixed Calendar Invariable Calendar Positivist calendar World Calendar World Season Calendar The following are leap week calendars: Hanke–Henry...
28 KB (3,753 words) - 12:12, 7 July 2025
A perpetual calendar is a calendar valid for many years, usually designed to look up the day of the week for a given date in the past or future. For the...
26 KB (1,363 words) - 13:02, 21 January 2025
52 weeks (364 days). In leap years, a one-week month called Pax would be inserted after Columbus. To get the same mean year as the Gregorian Calendar this...
7 KB (867 words) - 10:20, 20 May 2025
year. Leap week calendar plans often restrict common years to 364 days, or 52 weeks, and expand leap years to 371 days, or 53 weeks. The added week may...
10 KB (1,363 words) - 00:01, 5 October 2023
1852 (category Leap years in the Gregorian calendar)
(MDCCCLII) was a leap year starting on Thursday of the Gregorian calendar and a leap year starting on Tuesday of the Julian calendar, the 1852nd year...
27 KB (2,851 words) - 15:08, 6 July 2025
1840 (category Leap years in the Gregorian calendar)
(MDCCCXL) was a leap year starting on Wednesday of the Gregorian calendar and a leap year starting on Monday of the Julian calendar, the 1840th year...
20 KB (2,143 words) - 04:51, 12 May 2025
1876 (category Leap years in the Gregorian calendar)
(MDCCCLXXVI) was a leap year starting on Saturday of the Gregorian calendar and a leap year starting on Thursday of the Julian calendar, the 1876th year...
36 KB (3,845 words) - 22:24, 14 July 2025
1868 (category Leap years in the Gregorian calendar)
(MDCCCLXVIII) was a leap year starting on Wednesday of the Gregorian calendar and a leap year starting on Monday of the Julian calendar, the 1868th year...
41 KB (4,428 words) - 08:54, 11 July 2025
1704 (category Leap years in the Gregorian calendar)
1704 (MDCCIV) was a leap year starting on Tuesday of the Gregorian calendar and a leap year starting on Saturday of the Julian calendar, the 1704th year...
26 KB (3,018 words) - 20:04, 13 July 2025
transitions or leap seconds, 1 week = 7 days = 168 hours = 10,080 minutes = 604,800 seconds. With respect to the Gregorian calendar: 1 Gregorian calendar year =...
64 KB (6,963 words) - 06:27, 5 July 2025
1856 (category Leap years in the Gregorian calendar)
(MDCCCLVI) was a leap year starting on Tuesday of the Gregorian calendar and a leap year starting on Sunday of the Julian calendar, the 1856th year of...
31 KB (3,393 words) - 01:21, 6 July 2025
determination of the day of the week for any date may be performed with a variety of algorithms. In addition, perpetual calendars require no calculation by...
48 KB (5,771 words) - 07:14, 3 May 2025
1788 (category Leap years in the Gregorian calendar)
(MDCCLXXXVIII) was a leap year starting on Tuesday of the Gregorian calendar and a leap year starting on Saturday of the Julian calendar, the 1788th year...
19 KB (2,258 words) - 04:46, 6 June 2025
1864 (category Leap years in the Gregorian calendar)
(MDCCCLXIV) was a leap year starting on Friday of the Gregorian calendar and a leap year starting on Wednesday of the Julian calendar, the 1864th year...
38 KB (4,298 words) - 12:04, 20 June 2025
Julian calendar, it adds a leap day every four years without exception, and begins the year on 11 or 12th of September in the Gregorian calendar (from...
15 KB (1,625 words) - 20:11, 13 July 2025
Symmetry454 (redirect from Symmetry454 Calendar)
In leap years, December becomes a 5-week month. The leap week is shown in grey text in the above calendar year. The preferred Symmetry454 leap rule...
12 KB (835 words) - 15:57, 12 March 2025
1660 (category Leap years in the Gregorian calendar)
1660 (MDCLX) was a leap year starting on Thursday of the Gregorian calendar and a leap year starting on Sunday of the Julian calendar, the 1660th year of...
30 KB (3,756 words) - 18:55, 19 February 2025
replacement for, the Julian calendar. The principal change was to space leap years slightly differently to make the average calendar year 365.2425 days long...
73 KB (8,363 words) - 15:55, 10 July 2025
Coptic calendar has a leap year every four years invariably; it does not skip leap years three times every 400 years. This calendar is based on the ancient...
15 KB (1,071 words) - 16:52, 14 July 2025
1796 (category Leap years in the Gregorian calendar)
(MDCCXCVI) was a leap year starting on Friday of the Gregorian calendar and a leap year starting on Tuesday of the Julian calendar, the 1796th year of...
89 KB (9,179 words) - 16:58, 7 June 2025
Intercalation (timekeeping) (redirect from Leap month)
insertion of a leap day, week, or month into some calendar years to make the calendar follow the seasons or moon phases. Lunisolar calendars may require...
6 KB (883 words) - 07:50, 9 July 2025
1752 (category Leap years in the Gregorian calendar)
(MDCCLII) was a leap year starting on Saturday of the Gregorian calendar and a leap year starting on Wednesday of the Julian calendar, the 1752nd year...
37 KB (4,519 words) - 13:00, 28 June 2024
1816 (category Leap years in the Gregorian calendar)
(MDCCCXVI) was a leap year starting on Monday of the Gregorian calendar and a leap year starting on Saturday of the Julian calendar, the 1816th year of...
19 KB (2,202 words) - 03:39, 13 July 2025