Hi Panakuva, and thanks for taking an interest in SFR.
I believe Dex's post should really now be updated - at the time, we did originally raid Thursday & Friday. However, now we pretty much raid everyday.
If you have a look at our website, you'll see, at the moment, we have scheduled raids Tuesday, Wednesday, Thursday and Friday. However, some of these raid are very quick, so we are capable of doing multiple raids on one day.
We also do spontaneous raids through out the week, meaning that there will always be content for our members to join in on every day. If there is a specific day for a specific raid you wish to play, we would be glad to sort out an arrangement.