I'm currently using watchOS2 and iOS9.0.2 on my iPhone 6S.
Despite having multiple events on every week and having my calendar complication showing the correct next event start hour, when entering the Calendar app on my Watch, I'm always getting "No events this week".
This started to happen after DST has started here in Brazil. Can this be the root cause?
I was also suffering for poor overall perfomance on my Simple watchface, when using the calendar complication. Removing it fixes the problem, but a resync solved it keeping the complication in place.
Update to the new OS