Day care kindergarten opens the window at 7.30 am in winter for ventilation 15 minutes. According to relevant information, day-care kindergartens open at 7: 30 every morning for ventilation, and open in winter 15 minutes. MOMYHOME Day Care is committed to providing professional education services for infants and families aged 0-4 years around the world, and creating an educational model integrating day care, early education, care and trusteeship, teacher training, parent classes and family services.