The month of Rajab 1438 AH will be in the islamic lunation number 17,251 with moon conjunction time on Tuesday, 28 March 2017 at 2:57 UTC. The crescent moon of Rajab 1438 AH should be easily visible by naked eye for people in the American continent. Those in Africa may need optical aids to see the hilaal of Rajab 1438 H on that evening (see crescent visibility map for Rajab 1438 AH below).
Therefore, globally, 1 Rajab 1438 H will be on Wednesday, 29 March 2017.
The rest of the world will be able to see the first crescent moon of Rajab the next evening on Wednesday, 29 March 2017.