Calculating if it's less than 24 hours between two dates and times in a string but I get an error java.time.format.DateTimeParseException:

Question

Im trying to calculate two dates in a string if its less than 24 hours but I get an error:

java.time.format.DateTimeParseException: Text '20 4 01:40 AM' could not be parsed: 
Unable to obtain LocalDateTime from TemporalAccessor: {DayOfMonth=20, 
MonthOfYear=4},ISO resolved to 01:40 of type java.time.format.Parsed

code:

    String today = "20 4 7:00 AM";
    String tomorrow = "21 4 8:00 AM";

   
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd M h:mm a");

    
    LocalDateTime date1 = LocalDateTime.parse(today, formatter);
    LocalDateTime date2 = LocalDateTime.parse(tomorrow, formatter);

    
    long diffHours = Math.abs(Duration.between(date1, date2).toHours());

    if (diffHours < 24) {
        System.out.println("The difference is less than 24 hours.");
    } else {
        System.out.println("The difference is greater than or equal to 24 hours.");
    }