From the bar graph, we can conclude that the number of children who have birthdays in:
January = 2
February = 3
March = 5
April = 4
May = 6
June = 11
July = 5
August = 7
September = 8
October = 9
November = 10
December = 1
The month with the maximum number of birthdays, i.e., 11 is June.