To reproduce the bug follow these:
1. Create a new task
2. add reminder , for example 10:00 from the PC.
3. Error the phone will pop-up at 09:00, but the PC will pop-up 10:00
Both the Computer and Phone are in the same time-zone and same time. I also setup the phone to take "Automatic time zone"

Expected: Both reminders(PC and phone) to pop up at 10:00.
Phone model: Samsung Galaxy S4.
Thanks in advance for the assistance.
Roman