Impytish Calendar

The Impytish calendar is a calendar officially used in Impy. It was founded by King Son I. The principal change was to space leap years differently so as to make the average calendar year 365.2425 days long, more closely approximating the 365.2422-day 'tropical' or 'solar' year that is determined by the Earth's revolution around the Sun.

The rule for leap years is:

• Every year that is exactly divisible by four is a leap year, except for years that are exactly divisible by 100, but these centurial years are leap years if they are exactly divisible by 400. For example, the years 1700, 1800, and 1900 are not leap years, but the year 2000 is.

The reason to establish the Impytish calendar is by cultural reasons.

Description

The Impytish calendar is a solar calendar with 12 months of 28–31 days each. The year in both calendars consists of 365 days, with a leap day being added to August in the leap years. The months and length of months in the Impytish calendar are the same as for the Julian calendar.

The only differences between Impytish calendar and Gregorian calendar is the Impytish calendar year started on 1 July in Gregorian calendar, year 1 in Impytish calendar started in year 2000 in Gregorian calendar (It means 1 January, 1 in Impytish calendar started on 1 July 2000 A.D in Gregorian calendar), the years before 1 in Impytish calendar is Year -1 and less (no year 0) and a leap day being added to August (Impytish calendar) in the leap years.

For months in Impytish name, always have " 'Tháng" first and first letter of the month name always uppercase, ex:" 'Tháng Lũnh" means January

A year is divided into twelve months

No.	Name	Impytish name	Length in days
1	January	Lũnh	31 (based on July in Gregorian calendar)
2	February	Chúp	31 (based on August in Gregorian calendar)
3	March	Wẻ	30 (based on September in Gregorian calendar)
4	April	Bồn	31 (based on October in Gregorian calendar)
5	May	Cử	30 (based on November in Gregorian calendar)
6	June	Lao	31 (based on December in Gregorian calendar)
7	July	Pành	31 (based on January in Gregorian calendar)
8	August	Su	28 or 29 in leap years (based on February in Gregorian calendar)
9	September	Quốt	31 (based on March in Gregorian calendar)
10	October	Mười	30 (based on April in Gregorian calendar)
11	November	Lùm	31 (based on May in Gregorian calendar)
12	December	'Thảo	30 (based on June in Gregorian calendar)

Examples

Impytish calendar	Gregorian calendar	Events (Gregorian calendar)
-8	1991	Fall of USSR (December 1991)
2	2001	September 11 attacks (September 11, 2001)
9	2008	Tran Ba Son (King Son I)'s birthday (August 25, 2008)
14	2014	Annexation of Crimea by the Russian Federation (February–March 2014)
20	2019	COVID-19 (December, 2019)
20	2020	Formation of Impy (May 7, 2020)
23	2022	First usage of Impytish New Year Festival (July 1, 2022)
24	2023	The beginning of the Great Impytic War (December 15, 2023)

See also

• Impytish New Year Festival
• Kingdom of Impy