Event Start/End Times

I would like to be able to specify Start and End times per event under a single target. This would make it easier to maximize peak darkness times before the Moon rises or after it sets. Right now the Moon doesn’t rise until 10PM but Astro Dark Begins at 8:45PM. I would like to be able to image with my Lum filter until the Moon rises and then switch over to Ha or another narrowband filter while the Moon is up.