The date is said in English by using ordinal numbers.
For example: We say third of June, not say three of June.
The ordinal numbers of the Date:
1st = First
2nd = Second
3rd = Third
4th = Fourth
5th = Fifth
6th = Sixth
7th = Seventh
8th = Eighth
9th Ninth
10th = Tenth
11th = Eleventh
12th Twelfth
13th = Thirteenth
14th = Fourteenth
15th = Fifteenth
16th = Sixteenth
17th = Seventeenth
18th = Eighteenth
19th = Nineteenth
20th = Twentieth
21st = Twenty-First
22nd = Twenty-Second
23rd = Twenty-Third
24th = Twenty-Fourth
25th = Twenty-Fifth
26th = Twenty-Sixth
27th = Twenty-Seventh
28th = Twenty-Eighth
29th = Twenty-Ninth
30th = Thirtieth
31st = Thirty-First