from datetime import datetime

def get_countdown():
    """
    Calculate the number of days until Manavi’s birthday (April 19, 2025).
    
    Returns:
        int: Number of days remaining.
    """
    birthday = datetime(2025, 4, 19)
    today = datetime.now()
    days_left = (birthday - today).days
    return max(0, days_left)  # Ensure non-negative