Java - Better way then using Ifs and repeating functions - DateRelated

So I've created a function to check my Date string for what month it contains - So that I can use this for multiple formats of dates (Before Soritios comes and tells me I'm a retard). But I'm using a lot of ifs and repeating the .contains function and it makes me want to puke. Is there a better way of doing this?

Also related my dates are in the format Weekday(String), Month(String) day(int- XX), Year(Int - XXXX). e.g. Sunday, June 27, 1965. I've had no luck so far with the built in functions.

    public static int CheckMonth(String s){
    String month = s.toLowerCase();

    if(month.contains("january")){return 1;}
    else if(month.contains("febuary")){return 2;}
    else if(month.contains("march")){return 3;}
    else if(month.contains("april")){return 4;}
    else if(month.contains("may")){return 5;}
    else if(month.contains("june")){return 6;}
    else if(month.contains("july")){return 7;}
    else if(month.contains("august")){return 8;}
    else if(month.contains("september")){return 9;}
    else if(month.contains("october")){return 10;}
    else if(month.contains("november")){return 11;}
    else if(month.contains("december")){return 12;}
    else {return -1;}       
}