Different sunset time? What???

[haring]

I am going to photograph a wedding in Miami in April 2011.
I have noticed that different websites give different sunset/sunrise times! Sometimes there is one hour (!) difference... It is a lot!

For example if you look for the sunset time for Miami for 04/23/2011 on this website:
Sunrise and Sunset for U.S.A. – Florida – Miami – coming days
or this one:
Sunrise & Sunset Times by Zip Code

The sunset time is: 7:48pm

On the NAVY's website: Sun or Moon Rise/Set Table for One Year: U.S. Cities and Towns — Naval Oceanography Portal

It is 18:48= 6:45pm!!!

Can somebody explain this to me???
I am sure others have faced this problem as well.

 

[Derrel]

Daylight Savings Time versus Standard Time would be my guess. The one site has a special DST tab to click...maybe that's the issue?

 

[bruce282]

From the Navy website.

Daylight Time

Daylight time is not implemented in this program. When daylight time is in use, add one hour to the times listed in the table.


Bruce