Time zones US/France
	Ex: California to France, add +9H
	    France to California, substract -9H

+6H	07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 01 02 03 04 05 06
	     |--------------------------|
	                       **********
Base	01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
	                       |--------------------------|
	                       *
+9H	10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 01 02 03 04 05 06 07 08 09
	-----------------------|                                            |--