Problems with camera calendar resetting. I'm not removing the battery, but it still resets every time I turn the camera off and turn it back on.
It could be that the Date/Time battery (CR2016 lithium battery) needs to be replaced. Page 38 of the user manual shows you how to replace the Date/Time battery.
Leaving the battery (not the Date/Time battery) in the camera is not a good idea as it may shorten the life of the battery (see page 21).
"If the battery is left in the camera for a prolonged period without the camera being used, a low electrical current may be discharged excessively and the battery's service life may be affected."