Astronomical Almanac ( Sun - Moon - Seasons )
SUN |
EARTH |
MOON |
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Day Length : 09:38 hrs Dawn : 06:44 On 21/05/2025 Sunrise : 07:14 On 21/05/2025 Transit : 12:03 On 21/05/2025 Sunset : 16:52 On 21/05/2025 Dusk : 17:22 On 21/05/2025 |
DAWN and DUSK are CIVIL TWILIGHT Astronomical Twilight Start : 05:36 Nautical Twilight Start : 06:09 Civil Twilight Start : 06:44 Civil Twilight End : 17:22 Nautical Twilight End : 17:57 Astronomical Twilight End : 18:30 |
Last Quarter 47% Illuminated Moonrise : 00:00 On 22/05/2025 Transit : 06:40 On 21/05/2025 Moonset : 13:28 On 21/05/2025 Moon at 23 days in cycle |
| New Moon | First Quarter | Full Moon | Last Quarter |
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Tuesday 27/05/2025 13:02 27 May 2025 03:02 UTC |
Tuesday 03/06/2025 13:41 03 June 2025 03:41 UTC |
Wednesday 11/06/2025 17:44 11 June 2025 07:44 UTC |
Thursday 19/06/2025 05:19 18 June 2025 19:19 UTC |
| Autumnal Equinox Start of Autumn |
Winter Solstice Start of Winter |
Spring Equinox Start of Spring |
Summer Solstice Start of Summer |
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20/03/2025 20:01 20 March 2025 09:01 GMT |
21/06/2025 12:42 21 June 2025 02:42 GMT |
23/09/2025 04:19 22 September 2025 18:19 GMT |
22/12/2025 02:03 21 December 2025 15:03 GMT |
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Solar Cycles - Explained |
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Southern Hemisphere |
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| Autumnal Equinox Start of Autumn Fall Equinox Northern Equinox March Equinox |
Winter Solstice Start of Winter June Solstice |
Spring Equinox Start of Spring Vernal Equinox Southern Equinox September Equinox |
Summer Solstice Start of Summer December Solstice |
Northern Hemisphere |
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| Spring Equinox Start of Spring Vernal Equinox Northern Equinox March Equinox |
Summer Solstice Start of Summer June Solstice |
Fall Equinox Start of Fall Autumnal Equinox Southern Equinox September Equinox |
Winter Solstice Start of Winter December Solstice |
An Equinox is an astronomical event that happens twice, once in spring and once in autumn, each year when the tilt of the Earth's axis is inclined neither away from nor towards the Sun. During Equinoxes the tilt of the Earth (with respect to the Sun) is 0° and because of it, the duration of the day and the night are almost equal on Equinox day i.e. 12 hours.
Equinoxes occur on 20th or 21st March and 22nd or 23rd September each year and both days has equal length of the day and the night.
During March it is spring time in the Northern hemisphere and March Equinox is called Vernal Equinox and Spring Equinox while it is autumn time in the Southern hemisphere and March Equinox is called Autumnal Equinox and Fall Equinox. In other words on March Equinox it is spring time in the UK, the USA, Canada, Russia, India and China while it is autumn time in Australia, Argentina, Chile, New Zealand and South Africa.
Similarly, during September it is autumn time in the Northern hemisphere and September Equinox is called Autumnal Equinox and Fall Equinox while it is spring time in the Southern hemisphere and September Equinox is called Vernal Equinox and Spring Equinox. In other words on September Equinox it is autumn time in the UK, the USA, Canada, Russia, India and China while it is spring time in Australia, Argentina, Chile, New Zealand and South Africa.
To avoid any confusion Equinoxes are preferably referred as March Equinox (Northern Equinox) and September Equinox (Southern Equinox).
