i have no idea about themes of coming goals, i'm usual player just like you
for theme suggestions, you can voice your wishes here:
https://forums.storm8.com/showthread...me-Suggestions
the "schedule" under spoiler is pure speculation basing on latest experience of abt half a year events.
mini goals are green colored there, 15day goals - yellow colored.
i'm in +/- same latitude, and this year's springtime were coming very hard, actually it's only one week old now after massive snow and frost... so, happy spring to both of us, and let's hope we'll get some wonderful spring goal this week