Occusim on specific days

The Occusim documentation says that it can be activated on specific days. However I can’t seem to get it to work using the suggested config. Has anyone been able to get the step_<name>_days: option to work?

In theory the following code should only run on weekends. But when I check the dump_times log in the AppDeamon for Occusim, it’s showing that the rule would run today, Wednesday 19/12/18. Which isn’t what I would expect.

step_weekend_bedtime_name: Weekend Bedtime
step_weekend_bedtime_days: sat,sun
step_weekend_bedtime_start: "22:15:00"
step_weekend_bedtime_end: "23:55:00"
step_weekend_bedtime_on_1: script.bedtime_routine