A few people have also expressed a similar desire:
http://discourse.stonehearth.net/t/sun-moon-clock-showing-local-time/8045
http://discourse.stonehearth.net/t/can-we-have-a-24hour-clock/14426
Although I don’t believe these mentioned weeks (since these don’t technically exist in the game!). I personal hope that there’s some sort of calendar function in the future so trader requests/demands for tribute no longer take up the notifications tab.