Perhaps this has been covered before. I have users that have many calendar entries attached to various times of the day (usually early in the morning) that are entitled "gw.trigger". If you press on that event, it says all day event.

Generally users get these showing up on business days (haven't seen them on sat or sun) and generally they don't show up for future days, until that day has come and gone, then we may or may not see them.

They aren't terribly annoying, but very noticeable.

We run version 315 build. It only seems to be happening with iPhones.