Daily Adjustments

Hotham Park Sundial

Sundial Time is not the same as Clock Time and adjustments have to made nearly every day. The following figures show the adjustments applicable to Hotham Park from January to June. For July to December click here. These values vary by a few seconds from year to year. As the Sundial shows time in Greenwich Mean Time (GMT) you must add one hour if reading it in British Summer Time (BST), in addition to the adjustments below. If you would like a more detailed explanation click here.

JANUARY FEBRUARY MARCH APRIL MAY JUNE
Date Minutes Date Minutes Date Minutes Date Minutes Date Minutes Date Minutes
1st +6.0 1st +16.2 1st +14.9 1st +6.4 1st -0.3 1st +0.6
2nd +6.4 2nd +16.3 2nd +14.7 2nd +6.1 2nd -0.4 2nd +0.7
3rd +6.9 3rd +16.4 3rd +14.5 3rd +5.8 3rd -0.5 3rd +0.9
4th +7.4 4th +16.5 4th +14.3 4th +5.5 4th -0.6 4th +1.1
5th +7.8 5th +16.6 5th +14.0 5th +5.2 5th -0.7 5th +1.2
6th +8.3 6th +16.7 6th +13.8 6th +4.9 6th -0.8 6th +1.4
7th +8.7 7th +16.7 7th +13.6 7th +4.7 7th -0.8 7th +1.6
8th +9.1 8th +16.8 8th +13.3 8th +4.4 8th -0.9 8th +1.8
9th +9.5 9th +16.8 9th +13.1 9th +4.1 9th -0.9 9th +2.0
10th +10.0 10th +16.8 10th +12.8 10th +3.8 10th -1.0 10th +2.2
11th +10.4 11th +16.9 11th +12.5 11th +3.6 11th -1.0 11th +2.4
12th +10.8 12th +16.9 12th +12.3 12th +3.3 12th -1.0 12th +2.6
13th +11.1 13th +16.8 13th +12.0 13th +3.1 13th -1.0 13th +2.8
14th +11.5 14th +16.8 14th +11.7 14th +2.8 14th -1.0 14th +3.0
15th +11.9 15th +16.8 15th +11.4 15th +2.6 15th -1.0 15th +3.2
16th +12.2 16th +16.7 16th +11.1 16th +2.3 16th -1.0 16th +3.5
17th +12.6 17th +16.7 17th +10.9 17th +2.1 17th -0.9 17th +3.7
18th +12.9 18th +16.6 18th +10.6 18th +1.9 18th -0.9 18th +3.9
19th +13.2 19th +16.5 19th +10.3 19th +1.7 19th -0.9 19th +4.1
20th +13.5 20th +16.4 20th +10.0 20th +1.5 20th -0.8 20th +4.3
21st +13.8 21st +16.3 21st +9.7 21st +1.3 21st -0.7 21st +4.5
22nd +14.1 22nd +16.2 22nd +9.4 22nd +1.1 22nd -0.6 22nd +4.8
23rd +14.3 23rd +16.1 23rd +9.1 23rd +0.9 23rd -0.6 23rd +5.0
24th +14.6 24th +15.9 24th +8.8 24th +0.7 24th -0.5 24th +5.2
25th +14.8 25th +15.8 25th +8.5 25th +0.5 25th -0.4 25th +5.4
26th +15.1 26th +15.6 26th +8.2 26th +0.4 26th -0.2 26th +5.6
27th +15.3 27th +15.4 27th +7.9 27th +0.2 27th -0.1 27th +5.8
28th +15.5 28th +15.3 28th +7.6 28th +0.1 28th 0.0 28th +6.0
29th +15.7 29th +15.1 29th +7.3 29th -0.1 29th +0.1 29th +6.2
30th +15.8 (Every 4 years) 30th +7.0 30th -0.2 30th +0.3 30th +6.4
31st +16.0 31st +6.7 31st +0.4

For the history of the Sundial and details of how the replacement was made and installed click here.

A graphical representation of the daily adjustments is shown below:

July to December

JULY AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER
Date Minutes Date Minutes Date Minutes Date Minutes Date Minutes Date Minutes
1st +6.6 1st +9.0 1st +2.5 1st -7.9 1st -13.8 1st -8.2
2nd +6.8 2nd +8.9 2nd +2.2 2nd -8.2 2nd -13.8 2nd -7.8
3rd +7.0 3rd +8.8 3rd +1.8 3rd -8.5 3rd -13.8 3rd -7.4
4th +7.2 4th +8.7 4th +1.5 4th -8.8 4th -13.8 4th -7.0
5th +7.3 5th +8.6 5th +1.2 5th -9.1 5th -13.8 5th -6.6
6th +7.5 6th +8.5 6th +0.8 6th -9.4 6th -13.7 6th -6.2
7th +7.7 7th +8.4 7th +0.5 7th -9.7 7th -13.7 7th -5.7
8th +7.8 8th +8.2 8th +0.1 8th -10.0 8th -13.6 8th -5.3
9th +8.0 9th +8.1 9th -0.2 9th -10.2 9th -13.5 9th -4.8
10th +8.1 10th +7.9 10th -0.6 10th -10.5 10th -13.4 10th -4.4
11th +8.2 11th +7.8 11th -0.9 11th -10.8 11th -13.3 11th -3.9
12th +8.4 12th +7.6 12th -1.3 12th -11.0 12th -13.2 12th -3.5
13th +8.5 13th +7.4 13th -1.6 13th -11.2 13th -13.0 13th -3.0
14th +8.6 14th +7.2 14th -2.0 14th -11.5 14th -12.9 14th -2.5
15th +8.7 15th +7.0 15th -2.3 15th -11.7 15th -12.7 15th -2.0
16th +8.8 16th +6.8 16th -2.7 16th -11.9 16th -12.5 16th -1.5
17th +8.9 17th +6.6 17th -3.0 17th -12.1 17th -12.3 17th -1.0
18th +8.9 18th +6.4 18th -3.4 18th -12.3 18th -12.1 18th -0.5
19th +9.0 19th +6.2 19th -3.7 19th -12.5 19th -11.9 19th 0.0
20th +9.1 20th +5.9 20th -4.1 20th -12.6 20th -11.6 20th +0.4
21st +9.1 21st +5.7 21st -4.5 21st -12.8 21st -11.4 21st +0.9
22nd +9.1 22nd +5.4 22nd -4.8 22nd -13.0 22nd -11.1 22nd +1.4
23rd +9.2 23rd +5.2 23rd -5.2 23rd -13.1 23rd -10.8 23rd +1.9
24th +9.2 24th +4.9 24th -5.5 24th -13.2 24th -10.5 24th +2.4
25th +9.2 25th +4.6 25th -5.9 25th -13.3 25th -10.2 25th +2.9
26th +9.2 26th +4.3 26th -6.2 26th -13.4 26th -9.9 26th +3.4
27th +9.2 27th +4.0 27th -6.5 27th -13.5 27th -9.6 27th +3.9
28th +9.2 28th +3.7 28th -6.9 28th -13.6 28th -9.3 28th +4.4
29th +9.1 29th +3.4 29th -7.2 29th -13.7 29th -8.9 29th +4.9
30th +9.1 30th +3.1 30th -7.5 30th -13.7 30th -8.5 30th +5.4
31st +9.0   31st +2.8         31st -13.8         31st +5.8

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© Hotham Park Heritage Trust – Registered Charity Number 1117011