Matthew posted “Ok how’s this, Wednesday at 2pm and 8pm CST?” on the River People group on Facebook.
This would be 8pm and 2am UK time on Yowie.

How does Yowie works.
You get the chance to chat one-on-one with Madina Lake! Before and during the chat, you can submit your question. You can talk with them in person or submit a text-question. You’ll need earphones (to prevent echoing) and a webcam. Once you submitted your question, you will be in a queue, waiting for your turn to chat with Madina.
It’s pretty much fun, so I hope to see you there! 

” We’re chatting on Yowie tomorrow at 2pm CST. Come hang out!” @Facebook

This would be 8pm for the UK (GMT). The RP once again thought of a new theme to dress up for the chat, this time it will be Pirates.

How does Yowie works.
You get the chance to chat one-on-one with Madina Lake! Before and during the chat, you can submit your question. You can talk with them in person or submit a text-question. You’ll need earphones (to prevent echoing) and a webcam. Once you submitted your question, you will be in a queue, waiting for your turn to chat with Madina.
It’s pretty much fun, so I hope to see you there!

Visit the page of the chat. Would be 8pm UK time (GMT) and 2pm CST.

How does Yowie works.
You get the chance to chat one-on-one with Madina Lake! Before and during the chat, you can submit your question. You can talk with them in person or submit a text-question. You’ll need earphones (to prevent echoing) and a webcam. Once you submitted your question, you will be waiting for your turn to chat with Madina.
It’s pretty much fun, so I hope to see you there!

It’s Yowie time! The chat will start 8pm GMT/12am CST (it will start in about 1,5 hours).
Go to chat.

How does Yowie works.
You get the chance to chat one-on-one with Madina Lake! Before and during the chat, you can submit your question. You can talk with them in person or submit a text-question. You’ll need earphones (to prevent echoing) and a webcam. Once you submitted your question, you will be waiting for your turn to chat with Madina.
It’s pretty much fun, so I hope to see you there!

Tune in tomorrow at 9:30pm CST/3am GMT at SiriusXM! I won’t be able to summarize/record it, so I hope that there is someone who is able to do that =)

The guys will have another videochat on Stickam August the 10th (Wednesday). It will take place at 4pm CST (10pm GMT, 5pm EST/2pm PST) on Stickam. The chat will only open when the guys are online, you can’t chat with other fans beforehand.
See you there!

…in one hour there will be another Madina Lake chat with Nathan (10pm UK time/4pm CST). Hopefully it will work out good today! Click here. Keep an eye on their Twitter, just in case if the chat will be moved etc.

[edit] there will be more chats in these next weeks as Nathan said!