鏡開き Kagami biraki

Today is 鏡開き. Well, I'm sick and I don't want to think about how to explain kagamibiraki in English. So only link in Japanese.
So yeah, somehow I'm sick. I've been careful not to get sick. I eat healthy too. I rinse my mouth and wash my hands often. But why? why I'm sick?! Sore throat, sneezing/coughing all day. But no fever. So I'm going to work everyday. ugh...