Light Calendar 2029/30

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The year 2029/30 runs from 03.02.2029 to 03.02.2030 and has the following astro­nomical fixed points: 17th New March (VE), 17th New June (SS), 17th New Septe (AE), 17th New Dece (WS) – explanation below, V1.2.4

< 2028/29 | 2029/30 | 2030/31 >

< 2028/29 | 2029/30 | 2030/31 >

Explanation:
The Light Calendar divides the year into 4 almost equal quarters, each centered exactly midway between the astronomical fixed points (winter solstice, vernal equinox, summer solstice, autumnal equinox). This creates 4 seasons with distinct character: Early Spring (days rapidly get brighter each day/ΝFeb-ΝApr, warmth arrives delayed), Early Summer (time of long days/ΝMay-ΝJul), Early Autumn (days rapidly get shorter each day/ΝAug-ΝOct), Early Winter (dark season with little daylight change/ΝNov-ΝJan).

Every year begins with 1st New Febr (start of Early Spring). The leap month is New Jan; in leap years it has one extra day (marked ¹). Leap years are shifted ca. two years compared to the Gregorian calendar. For practical reasons the year number still changes on 1st Jan as usual. The lunations of a light year are numbered 1-13 (similar to week numbers). A lunation belongs to a light year if its full moon occurs within that year. The cycle begins with the astronomical new moon: if this occurs before 12:00, the previous day/night counts as the beginning; after 12:00, the same day counts as the beginning.

This PHP version does NOT compute full astronomical precision (unlike the app), but provides a good approximation of all dates, seasons, and moon cycles. All times shown in Central European Time (UTC+1|2).

Lunations of light year 2029/30:
0. Moon – new: Sun, 14.01.29, full: Mon, 29.01.29
1. Moon – new: Mon, 12.02.29, full: Wed, 28.02.29
2. Moon – new: Wed, 14.03.29, full: Thu, 29.03.29
3. Moon – new: Fri, 13.04.29, full: Fri, 27.04.29
4. Moon – new: Sun, 13.05.29, full: Sun, 27.05.29
5. Moon – new: Mon, 11.06.29, full: Mon, 25.06.29
6. Moon – new: Wed, 11.07.29, full: Wed, 25.07.29
7. Moon – new: Thu, 09.08.29, full: Thu, 23.08.29
8. Moon – new: Fri, 07.09.29, full: Sat, 22.09.29
9. Moon – new: Sun, 07.10.29, full: Sun, 21.10.29
10. Moon – new: Mon, 05.11.29, full: Tue, 20.11.29
11. Moon – new: Wed, 05.12.29, full: Thu, 20.12.29
12. Moon – new: Thu, 03.01.30, full: Sat, 19.01.30
13. Moon – new: Sat, 02.02.30, full: Sun, 17.02.30

The moon display (see above) works as follows: Μx·y(p/z) = x. Moon, y. Day, p=full moon day, z=cycle length.

In the same vein is 'Gordon's Sun Clock', a single-hand clock whose dial changes daily with the seasons. It is available as a free Android app:

Gordon’s Sun Clock >
Info about Light Calendar (Github) >

For more precise calculations, please check the Android app or the web app.