Telling the time

To tell the time, start off by saying il est ('it is'), then give the hour e.g. quatre, then say heures ('hours'), or heure if it's 1 o'clock, and finally give the number of minutes. Instead of saying quinze and trente you have the choice of saying et quart and et demie to mean 'quarter past' and 'half past' 
Here are some examples:

il est une heure cinq
il est deux heures dix
il est trois heures quinze
il est trois heures et quart
il est quatre heures vingt
il est cinq heures vingt-cinq
il est six heures trente
il est six heures et demie

il est deux heures moins cinq
il est trois heures moins dix
il est trois heures moins quinze
il est trois heures moins le quart
il est quatre heures moins vingt
il est cinq heures moins vingt-cinq

it's 1.05
it's 2.10
it's 3.15
it's quarter past three 
it's 4.20
it's 5.25
it's 6.30
it's half past six

it's five to two
it's ten to three
it's fifteen to three
it's quarter to three
it's twenty to four
it's twenty-five to five