Good morning mam in Spanish

Good morning in Spanish is Buenos Dias.
Buenos Dias until 12 noon. Afternoon buenas tardes. Evening buenas noches.
There are two common greetings:

¡Buenos días! ['bwe.noz. 'ði.as]

¡Buen día! ['bwen̪. 'di.a]
Buenos Dias
Buenos dias.
Buenos días is the answer