------
## 最终结论
```python
def check_monthnumber(month_name):
    months_with_30_days = ['April', 'June', 'September', 'November']
    return month_name in months_with_30_days

# Test cases
assert check_monthnumber("February") == False
assert check_monthnumber("June") == True
assert check_monthnumber("April") == True
```