Salaat Umm Dawood halfway through Rajab.

The du’aa’s which are recited specifically during Rajab are all fabrications and innovations.

Visiting graves specifically in Rajab is bid’ah, because graves are to be visited at any time of the year.

We ask Allaah to make us of those who venerate the things that He has made sacred and adhere to the Sunnah of the Prophet (peace and blessings of Allaah be upon him) outwardly and inwardly, for He is the One Whom we should ask and He is Able to do that. And the close of our request is: praise be to Allaah, the Lord of ‘Aalameen (mankind, jinns and all that exists).
Taken From: http://www.islam-qa.com
Sheikh Saalih al-Munajjid