There are a few improvements to the Roster Calendar service that haven't been listed here previously.
I have added an option to change the times displayed in the headings of the calendar entries for each sector. Note that this is per sector - not the trip summary. Some people prefer the local time and others prefer zulu time. This is now an option. You can also choose to have both.
Many people have been asking about controlling the colour of their roster on their Apple iOS devices. There is now an option to set the display colour. This was a particular problem because Apple chooses to store the colour setting on the calendar server. Other devices (eg. Android) store the colour choice in the device. Since the server is read-only in order to avoid unauthorised changes by the people you share your calendar with, the Apple devices cannot store the colour preference. This is fixed by choosing the colour through the website. If you only use Android devices then you can ignore this option.
Both these new options are on the Settings - Calendar page.