RAJAB
With the commencement of the month of Rajab, our Prophet sallallaahu ‘alayhi wasallam used to make the following du’a:

اللّهُمّ بارِكْ لَنا في رَجَبَ وَ شَعْبانَ وَ بَلِّغْنا شَهْرَ رَمَضان

Allaahumma baarik lanaa fee rajaba wa sha’baana wa ballighnaa shahra ramadhaan
“O Allah, bless us in Rajab and Sha’baan and make us reach Ramadhaan