You can download the update directly on your device through the SW Update app or using the Nokia Suite.
Once you have updated your device make sure that you reboot it before you start using the application to ensure that the update is installed properly.
The update rollouts are region specific and may take some time to be available in all regions. If you don’t have the update already it should be available in your region soon. Leave a comment if you have already received the Calendar Fix update for your Symbian device.
source – All About Symbian