Advancement of Day Night Cycle Suggestions

Hey All,

I have a day/night cycle but I have a couple questions regarding methods used. I will attach screenshots of the methods I am currently using. So as of right now I am using a timeline on EventGraph that is set to auto start which controls sun time and nebula brightness. Works great, however going forward I would like to remove the timeline and switch to the on tick event due to adding in weather components, calendar date etc… Is there a way to use the timeline external curve without the timeline itself so as to place it on the event tick instead?