How would you handle time differences in countries that have the same time zone but where the sun rises at slightly different times? For example, in Italy the

How would you handle time differences in countries that have the same time zone but where the sun rises at slightly different times? For example, in Italy the sun rises approximately eight minutes later in Rome than in Venice. See here http://fabrizio.zellini.org/orario-alba-e-tramonto/?lang=en&country=39 http://fabrizio.zellini.org/orario-alba-e-tramonto/?lang=en&...