UK Ramadan fasting times for 2020

ASTRONOMICAL DATA FOR RAMADAN 2020


– by Imam Dr Usama Hasan, Fellow of the Royal Astronomical Society

 

Ramadan & Eid Dates 2020-2025 (approx.)

Based on Crescent Moon Visibility data for London from HMNAO’s Websurf 2.0 website

(Moon Visibility is estimated on a scale of A-F. The following dates are based on the approximation that A-C represent a visible crescent moon; D-F represent an invisible moon.)

YEAR Beginning of Ramadan (+/- 1 day) Eid al-Fitr
(+/- 2 days)
2020 25 April 25 May
2021 14 April 14 May
2022 03 April 02 May
2023 23 March 22 April
2024 12 March 10 April
 2025 02 March 31 March

 

Examples of dawn/sunset timings for the UK (four UK capital cities), 2020

Dates used are: 25th April (~1st Ramadan), 9th May (~15th Ramadan) & 23rd May (~29th Ramadan)

Date City Dawn
(18°)
Dawn (15°) Dawn (12°) Sunrise
(SR)
Sunset
(SS)
Fasting length (18°) Fasting length (15°) Fasting length (12°) Fasting length SR-SS
25 April London 03:23 03:53 04:19 05:43 20:15 16:52 16:22 15:56 14:32  
9 May   02:32 03:12 03:44 05:18 20:37 18:05 17:25 16:53 15:19  
23 May   *** 02:31 03:13 04:58 20:58 *** 18:27 17:45 16:00  
25 April Edin-burgh 02:45 03:28 04:03 05:42 20:41 17:56 17:13 16:38 14:59  
9 May   *** 02:23 03:15 05:11 21:09 *** 18:46 17:54 15:58  
23 May   *** *** 02:19 04:46 21:34 *** *** 19:15 16:48  
25 April Cardiff 03:35 04:05 04:31 05:56 20:27 16:52 16:22 15:56 14:31  
9 May   02:44 03:24 03:57 05:30 20:50 18:06 17:26 16:53 15:20  
23 May   *** 02:43 03:25 05:10 21:10 *** 18:27 17:45 16:00  
25 April Belfast 03:15 03:52 04:23 05:57 20:47 17:32 16:55 16:24 14:50  
9 May   *** 02:58 03:40 05:28 21:13 *** 18:15 17:33 15:45  
23 May   *** *** 02:57 05:05 21:37 *** *** 18:40 16:32  

 

 

KEY:

18° refers to astronomical twilight, which begins or ends when the sun is 18 degrees below the horizon

15° refers to when the sun is 15 degrees below the horizon

12° refers to nautical twilight, which begins or ends when the sun is 12 degrees below the horizon

The astronomical definition of “dawn” is disputed, with various Muslim religious authorities adopting one of the three possible definitions given above.

*** in the above table means that the timing is not available, because the sun does not reach that far below the horizon. This happens every year during the summer at high latitudes, such as the UK.

 

NOTES:

  1. We must emphasise that the actual dates of the beginning of Ramadan and Eid, given above, are subject to vary by one or two days, within Muslim communities in the UK, due to different community approaches to determining these dates.
  2. If we use 18° astronomical twilight (Sun’s depression = 18 degrees) as the start of dawn, the fasting start time and fasting length are undefined for most of Ramadan 2020 in Edinburgh & Belfast. They are defined for most of the month, except towards its end, in Cardiff & London, where the fasting length is around 17-18 hours.
  3. If we use 15° (Sun’s depression = 15 degrees) as the start of dawn, the fasting start time and fasting length are undefined for most of Ramadan 2020 in Edinburgh & Belfast, except towards its end, where the fasting length is 17-19 hours. However, dawn does occur throughout the month in both London and Cardiff, giving fasting lengths of 16.5-18.5 hours.
  4. If we use 12° nautical twilight (Sun’s depression = 12 degrees) as the start of dawn, this results in fasting hours during Ramadan 2020 in London and Cardiff of 16-18 hours, in Belfast of 16.5-18.5 hours, and in Edinburgh of 16.5-19 hours.
  5. If we use Sunrise as the start of fasting, this results in fasting hours during Ramadan 2020 in London and Cardiff of 14.5-16 hours, in Belfast of 15-16.5 hours, and in Edinburgh of 15-17 hours.

The HMNAO data portal is: http://astro.ukho.gov.uk/ – please note that there is no www. prefixing this resource address.

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