The map below shows isochrones or lines linking places with the same times of sunrise (green lines) and sunset (red lines) for the United Kingdom for mid-March. These lines show the position of the terminator, the boundary between the illuminated and dark areas of the Earth, as it sweeps across the face of the globe. At this time of the year the terminator for both sunrise and sunset runs north south. The coast of East Anglia has the earliest sunrise and sunset and North Uist in the Outer Hebrides has the latest sunrise and sunset. The time system used in the map is Greenwich Mean Time (GMT) which can be regarded as UTC for the purposes of this exercise. For example, we can see that sunrise in Cambridge occurs at 06:15 GMT and sunset in Liverpool occurs at 18:15 GMT.
If the United Kingdom elected to move to Central European time (CET), one hour in advance of GMT for the Autumn and Winter months, this would mean darker mornings and lighter evenings. For example, sunrise in London would take place at 07:16 CET and sunset would take place at 19:04 CET. In Glasgow, sunrise would take place 07:34 CET and sunset at 19:19 CET. In the case of Northern Ireland, sunrise times would occur between 07:40 CET and 07:50 CET. Stornoway would see the Sun rise at 07:43 CET and set at 19:27 CET.
Remember! The clocks go forward one hour on the last Sunday of March at 01:00 GMT and move from Greenwich Mean Time to British Summer Time. If the United Kingdom adopts the Central European time zone, then clocks will move forward on the same date at 02:00 CET and move from Central European Time to Central European Summer Time.
|Sunrise/set times for mid-March|