Calendar Description - Scheme ay
The Astronomical Year calendar is a hybrid variant combining the Julian and the Gregorian calendars. The calendar contains the year zero and prior years are shown as negative.
See Wikipedia entry.
Use Case
- This calendar is commonly used by astronomers. Typically only the year value is used.
Definition
The Record consists of four Fields named scheme, year,
month and day.
| Record - Default Order | |||
|---|---|---|---|
| scheme | year | month | day |
| Record - Ranking Order | |||
|---|---|---|---|
| year | month | day | scheme |
| Historic Era | ||||
|---|---|---|---|---|
| Calendar Scheme | Start | Finish | Range | |
| 0 | Julian | past | j# 4 Oct 1582 | past..2299160 |
| 1 | Gregorian | g# 15 Oct 1582 | future | 2299161..future |
For the range past..2299160 (j# 4 Oct 1582) the Julian Calendar is used. There is zero and negative years. For the range (g# 15 Oct 1582) 2299161..future the Gregorian calendar is used.
The year 1582 has 355 days.
As a Hybrid calendar, it has no single epoch.
Formats
The formats supplied with this scheme.
| Formats - Grammar jg | |||||
|---|---|---|---|---|---|
| Code | Rule | Pseudo | Example | Note | |
| dmy | text | Input: day month year Output: dd Mon yyyy | 4 Oct 1582 15 Oct 1582 | D, S | |
| dmy+ | text | Input: day month year Output: dd Month yyyy | 4 October 1582 15 October 1582 | S | |
| mdy | text | Input: month day year Output: Mon dd, yyyy | Oct 4, 1582 Oct 15, 1582 | S | |
| mdy+ | text | Input: month day year Output: Month dd, yyyy | October 4, 1582 October 15, 1582 | S | |
| dmys | text | Input: day month year scheme Output: dd Mon yyyy sch | 4 Oct 1582 j 15 Oct 1582 g | ||
| dmys+ | text | Input: day month year scheme Output: dd Month yyyy Scheme | 4 October 1582 Julian 15 October 1582 Gregorian | ||
| mdys | text | Input: month day year scheme Output: Mon dd, yyyy sch | Oct 4, 1582 j Oct 15, 1582 g | ||
| mdys+ | text | Input: month day year scheme Output: Month dd, yyyy Scheme | October 4, 1582 Julian October 15, 1582 Gregorian | ||
| def | text | Input: scheme year month day Output: s yyyy mm dd | 0 1582 10 4 1 1582 10 15 | H | |
| u | unit | Input: 9s 9y 9m 9d Output: 9s 9y 9m 9d | 0s 1582y 10m 4d 1s 1582y 10m 15d | H | |
| Notes: D = Default, H = Hidden, S = Range shortcut supported. Example based on jdn# 2299160 and 2299161 | |||||
Script
| Script - Module hics:ay |
|---|
| lexicon jg { name "Hybrid Julian and Gregorian scheme names"; fieldname scheme; lang en; pseudo Scheme sch; tokens { 0, "Julian", "j"; 1, "Gregorian", "g"; } } grammar jg { name "Hybrid Julian and Gregorian"; fields scheme year month day; rank year month day; lexicons m jg; alias pseudo { dd day; mm month; yyyy year; s scheme; } alias unit { d day; m month; y year; s scheme; } format dmy "{day} |{month:m:a} |{year}"; format "dmy+" "{day} |{month:m} |{year}"; format mdy "{month:m:a} |{day}, |{year}"; format "mdy+" "{month:m} |{day}, |{year}"; format dmys "{day} |{month:m:a} |{year} |{scheme:jg:a}"; format "dmys+" "{day} |{month:m} |{year} |{scheme:jg}"; format mdys "{month:m:a} |{day}, |{year} |{scheme:jg:a}"; format "mdys+" "{month:m} |{day}, |{year} |{scheme:jg}"; preferred dmy; } scheme ay { name "Astronomical Year"; base hybrid { fields scheme year month day; scheme 0 { base julian; } change 2299161; // g# 15 Oct 1582 scheme 1 { base gregorian; } } grammar jg; } |
The script uses the lexicon "m" definition from the j Julian scheme.
