[curt.clifton]

A thread back in June (I think) discussed that repeats by day, week, month or year should default to 12am, but repeats by hour or minute should retain their time of day.

What happens if you set it to repeat 24 hours from completion time?

And if you want to do the task every evening, why not repeat 24 hours from assigned date? Otherwise the task due time creeps later whenever you miss the deadline. (Or earlier if you do the task early. I've never had that particular problem!)