Count A certain day in a Mounth

[lior_zioni_danc]

Hello
1.How can i count a certain day or what a function i need to use for counting for example how many Sunday’s i have in july
2. How can i use it with the google calendar…
For example i have the same math class every Sunday’s in 10:00 pm but there are Sunday’s that it canceled like holidays how can i count it base on the calendar
Tnx