Hours in calendar don't respect the correct timezone
I use most of the time the calendar (and also the email for what matters) from my smartphone or from Thundebird on desktop.
These days I have to use the web interface for the calendar and I've noticed that if I create an event in the web interface it shows a wrong timing on all the other devices. I have set up the timezone as +00:00 GMT Greenwich (as it is my current timezone) but all the events I add from the web interface shows up an hour later (like in a +1 timezone).
This is a huge problem honestly, I'm glad I've noticed it now so I know this and be careful not to rely too much on this calendar. As a paying user I'd really need to see this fixed, though.