If you are user of Nokia C3 and want to set your Calendar please folow this instruction below:
Select Menu > Calendar.The current day is framed. If there are any notes set for the day, the day is in bold.
Add a calendar note

If you want to setting Add a calendar note,please to Go to a date, and select Options > Make a note.You also can do setting to View the details of a note please Go to the note, and select View.
Delete all notes from the calendar
Select Options > Delete notes > All notes.

How to Settings Your Profile
Profiles
Waiting for a call, but can’t let your device ring? There are various settings groups called profiles, which you can customise with ringing tones for different events and environments.
Select Menu > Settings > Profiles.
Select the desired profile and from the following:
Activate — Activate the profile.
Personalise — Modify the profile settings.
Timed — Set the profile to be active untila certain time. When the time set for the
profile expires, the previous profile that was not timed becomes active.
Tones
You can modify the tone settings of the selected active profile.
Select Menu > Settings > Tones. You can find the same settings in the Profiles
menu.
Display
To view or adjust the wallpaper, font size,or other features related to the device
display, select Menu > Settings > Display.
Date and time
Select Menu > Settings > Date and time.
Set the date and time
Select Date & time settings.
Set the date and time format
Select Date & time format.
Update the time automatically according to the current time zone
Select Auto-update of time (network service).

I hope its usefull for u and please any question what u want

Modify internet connection settings Select Internet connection > Ask first or Do not ask. If you select Ask first, you are asked for the connection method every time you open an application that requires an internet connection, such as Browser or Mail. If you select Do not ask, the device connects to a saved WLAN, if available, when an application requires an internet connection.
Hidden WLANs do not broadcast their service set identifier (SSID). They are marked as (Hidden network) in the list of available WLANs. You can only connect to a hidden network if you know its SSID.
Connect to a hidden network
1 Select (Hidden network).
2 Enter the SSID of the network, and select OK.
When you save the hidden network, it is displayed in the list of available WLANs. Important: Always enable one of the available encryption methods to increase the security of your wireless
LAN connection. Using encryption reduces the risk of unauthorised access to your data.
Saved WLANs
Display, manage, connect to, and prioritise your saved wireless LANs (WLAN).
Select Menu > Settings > Connectivity > WLAN and Saved WLANs.
The WLAN with the highest priority is listed first.
Manage your WLANs
Select Options and from the following:
Connect — Connect to the WLAN manually.
Remove from list — Remove the WLAN.
Organise priority — Change the priorities of saved WLANs.
Forward settings — Forward the settings of a saved WLAN. Enter the security code and phone number, and select Send.
Add new network — Add a new WLAN, and define the settings. Edit WLAN parameters
Scroll to a WLAN, and select Edit and from the following:
Connection method — Connect to an available WLAN automatically.
Network name — Enter a name for the WLAN.
Network settings — Define the WLAN settings.