Вернуть True, если дата есть в нашем календаре, и False иначе

def check_date(d, m, y):
    if d < 0 or m < 0 or n < 0:
     return False
    mon = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
    if y % 400 == 0:
        mon[1] = 29
    if m >= 1 and m <= 12:
      if d > 0 and d <= mon[m-1]:
        return True
    return False
d = int(input('Date: '))
m = int(input('Month: '))
y = int(input('Year: '))
print(check_date(d, m, y))

def check_date(d, m, y):
    if d < 0 or m < 0 or y < 0:
        return False
    mon = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
    if y % 400 == 0:
        mon[1] = 29
    if m >= 1 and m <= 12:
        if d > 0 and d <= mon[m-1]:
            return True
        return False
    
d = int(input('Day: '))
m = int(input('Month: '))
y = int(input('Year: '))
 
print(check_date(d, m, y))

def check_date(d, m, y):
    try:
        d = datetime.date(y, m, d)
        return True
    except ValueError:
        return False

def check_date(d, m, y):
    is_leap = y % 4 == 0 and y % 100 != 0 or y % 400 == 0
    if not 1 <= m <= 12 and 1582 <= y <= 3000:
        return False
    if m in [4,6,9,11]:
        return 1 <= d <= 30
    elif m == 2:
        return 1 <= d <= 28 + is_leap
    else:
        return 1 <= d <= 31
 
d, m, y = [int(x) for x in input('d,m,y->').split()]
print(check_date(d,m,y))

def check_date(d, m, y):
    is_leap = y % 4 == 0 and y % 100 != 0 or y % 400 == 0
    if not (1 <= m <= 12 and 1582 <= y <= 3000):
        return False
    if m in [4,6,9,11]:
        return 1 <= d <= 30
    elif m == 2:
        return 1 <= d <= 28 + is_leap
    else:
        return 1 <= d <= 31
 
d, m, y = [int(x) for x in input('d,m,y->').split()]
print(check_date(d,m,y))

def check_date(d, m, y):
    return (1 <= d <= [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][m-1]+(y % 4 == 0 and y % 100 != 0 or y % 400 == 0)) if 1 <= m <= 12 else False
    
d, m, y = [int(input(x)) for x in ('Day: ', 'Month: ', 'Year: ')] 
print(check_date(d, m, y))

def check_date(d, m, y):
    is_leap = y % 4 == 0 and y % 100 != 0 or y % 400 == 0
    d_max = 30 if m in [4, 6, 9, 11] else 28 + is_leap if m == 2 else 31
    return 1 <= d <= d_max and 1 <= m <= 12 and 1582 <= y <= 3000
 
d, m, y = [int(x) for x in input('d,m,y->').split()]
print(check_date(d, m, y))

def check_date(d: int, m: int, y: int) -> bool:
    try:
        _ = datetime.date(y, m, d)
    except ValueError:
        return False
    return True

def check_date(d, m, y):
    # is_leap = y % 4 == 0 and y % 100 != 0 or y % 400 == 0
    if not (1 <= m <= 12 and 1582 <= y <= 3000):
        return False
    if m in [4,6,9,11]:
        return 1 <= d <= 30
    elif m == 2:
        is_leap = y % 4 == 0 and y % 100 != 0 or y % 400 == 0
        return 1 <= d <= 28 + is_leap
    else:
        return 1 <= d <= 31