Es mediodía. You can also say: Son las doce de la tarde.
mediodia
midday
midi
When it's on 12pm midday on the dot because it's during the day and it's alright to say good morning when you wake up and it's after 12pm midday.
You do - as opposed to 2400 hrs which is mid night
You could use midday.
Midday is twelve of clock noon. What comes after midday is after-midday, or the afternoon. The abbreviation p.m. means post meridiem, or post midday.
Midday is 12 noon or 12 midday. It is not 12 p.m. as p.m. means 'after midday'; nor is it 12 a.m. as a.m. means 'before midday. Logically, midday cannot be before or after midday. Similarly, midnight is 12 midnight.
le repas de midi literally: midday meal
midday
There are 48 hours from midday on Friday to midday on Sunday.