Budhist monastery rituals

I am not sure if I should ask this on this site and I apologise if I shouldn't. Just let me know and will be out of your hear. :D I am going to go to South East Asia at the end of December and will stay there for about 5 months. I am really interested to see buddist ceremonies/festivals. I am from Romania (not a buddhist country) and there, in each region, monasteries have certain rituals which apply only for their region. I was wondering if there is anything like this in SEA as well? Or which are the rituals you would definitely want to go to? I would also like to go to monasteries where maybe you can join the muns for meditation for a day before moving on. I know you are supposed to do at least 7 days, but my partner is not really that into this type of things although he would have the patience of trying it for a day here and there. I am trying to ease him into it. :D Please let me know what you think and again, if it was inaproprite for me to ask this here, I apologise.