Be warned if you use ComingNext and want to update your C6-00 with the recent firmware update 40.0.021. Nokia has introduced a bug which also affects the E6 and the X7 which renders the widget (and any other WRT widget which access the calendar) completely unusable. There is nothing I can do to resolve this, Nokia has to fix the issue with another firmware update. So if you want to continue to use this widget on the C6, don't update! You have been warned.
By the way, this bug is also the reason why I couldn't release a version which is compatible with the E6 and the X7 yet.
UPDATE [2011-07-04]: Looks like the latest firmware update 50.0.001 for the 5230 is broken too. Do not upgrade! It is very likely that this bug will spread to other devices like the N8 and E7 too when they get their new firmware in a few days.
UPDATE [2011-07-05]: N97 Mini affected too since firmware update v30.0.004.
UPDATE [2011-07-29]: Nokia has marked this bug as resolved. So most firmware updates released after this date should have this problem fixed.
UPDATE [2011-10-13]: Issue is confirmed to be resolved for the C6-00 as of firmware update 41.0.010.
UPDATE [2011-12-07]: Issue is confirmed to be resolved for the Nokia 5230 as of firmware update 51.0.002.
UPDATE [2011-12-31]: Issue has been reported for the Nokia 5800 XpressMusic as of firmware v60.0.003.
UPDATE [2012-02-12]: Issue is confirmed to be resolved for the E6-00 and the X7-00 as of firmware 25.007 (Symbian Belle Update).