OK some are easier to use than others and I already have one that is super simple and absolutely meets my requirements, and some of the newer offerings I would advise you to carry an instruction booklet with you at all times – and that’s no good at all.
Citizen Eco-Drive World Calendar A-T CB0020-09E
To change the Time Zone, simply turn the crown and the seconds hand will point to the City Time Code you wish, then push in the Crown. The analog hands will immediately move to the correct time for that Zone – and that’s it – done! Possibly the easiest travel time setting you’ll ever meet