You should be able to edit any rule. The trick is that since you've already added actions, to get the IFs and things suggested above, you'll have to use the options like "Insert action before". You can't re-order actions after they've been added, only delete and add new ones elsewhere (before another or at the end)--a limit to the app UI model Hubitat inherited from a certain other platform many of us migrated from. 
Starting a new rule and creating it as above would also work. You could also manually disable your app, including the Simple Lighting automations, rather than automating the dates, though I do like the idea of automating that, which would probably be most easily done with RM (or you can delete it and re-create it next year--I'm trying not to do that this year, but I can't guarantee I won't totally re-do any of my hubs before then...).
