Merge pull request #306 from zivchang/next

[bug fixing] TDIS-6953
[Calendar] Bug fixing.

* [NABI-RSA] TDIS-6952, TDIS-6954
Merge pull request #307 from wcwang/next

[Calendar] Bug fixing.
Date cannot take TZDate as input argument
fix notification.post() bug

fix notification.post() without argument will throw wrong error