Took me a while. Shia muslims ( as opposed to Suni Moslems) are a huge sect of Islam. Add 'v' and you get shiva. I'm late to the event I see, but I thought it was quite a good clue - if rather assuming that you know a few basics about Islam.
Sorry, but I really know quite a lot of people who don't. I wasn't talking down to anyone. Apologies for any offence caused, it was unintentional and well-meant.