Are Sundials One Hour Slower In Summer Due To The Fact GMT is one hour behind BST?

Question

I am doing a GCSE in Astronomy and was just wondering as my sundial seems right and i have already taken into account the equation of time and mean local time. Does anyone know, thanks.

Answer 1

Try turning the sun dial to suit the hour change.

All sun dials have revolving tops, or should have.  

Answer 2

there's a difference between 'GMT' and solar time.

a sundial doesn't know where you are in relation to the borders of your time zone, so it could be reading 1:00 at 1:00 or anything else up to 2:00 or more if you are on Summer time.

the farther west you are of the beginning of the zone, the lower the Sun will be on the horizon, thus earlier in Solar time.

Answer 3

sun dials are right for the time of year you set it up.  beings length of days change, sunrise sunset change.  If you made your sundial basing it on summer sun, it will be right.  But you can get an 7 am reading and a 8pm reading.  Those same readings in winter would be at like 8 am  and 5-6 pm when days are shorter