There is an issue with Todoist.
When the clocks went back in the UK for Daylight Saving at the end of October, all my appointment times for after that date went weird.
I.E. I had a Doctors appointment for 16 November @ 10:30am but when the clocks went back by 1 hour my appointment changed to 09:30am. This should not happen. With lots of appointments I had to call them all to confirm the times of the appointments.
I do not think Todoist should knock an hour off my appointments.