It's 12:00 p.m. <em>Son las doce del mediodía</em>.
It's 7:05 a.m. <em>Son las siete y cinco de la mañana</em>.
It's 9:35 p.m. <em>Son las nueve y treinta y cinco de la noche</em>.
It's 5:15 p.m. <em>Son las cinco y quince de la tarde</em>.
It's 1:30 p.m. <em>Es la una y media de la tarde</em>.
Explanation:
The times in Spanish are easy to write in letters, you just have to keep in mind:
If the time is from two to twelve, the word <em>"Son"</em> is used, on the other hand, if the time is 1, regardless of whether it is o'clock or with a few minutes, the word <em>"Es"</em> is used.
The hour is mentioned first than the minutes.
The hour and minutes are divided by the letter <em>"y"</em>.
You should remember that 12:00 p.m. occurs at noon and 12:00 a.m. occurs at midnight.