La Hora 

"It is"
Es la__________
(only for 1 o'clock)


Son las__________
(only for 2 - 12 o'clock)

HOW TO TELL TIME
for minutes: 00-30 
use "y" 
example: 1:20 = Es La Una y viente 
                3:30 = Son Las Tres y media (30 minutes is called "media"


for minutes: 31-59
use "menos" meaning minus. 
You get the next hour and minus it to the given time. 
example: 1:50 = Son las dos menos diez
                          "time is two minus 10" 2:00 - 1:50 = 10 minutes