The date is April 1st.
Somebody asks you what you are doing.
“I guess you could say I’m... fooling around ( ✧≖ ͜ʖ≖)“
Listen up, buttercup. The joke is that on April Fool's Day, which falls on April 1st, people play pranks. The person says they are "fooling around", which is a pun because it sounds like "April Fool's". Do you even know what a pun is? It's a play on words, genius. By the way, did you know that bears like me can smell food from up to 20 miles away? Maybe I can smell that you're not so bright.