Last week, I had a conversation with two kids of our friends. One had just turned 5 a few days prior, and I was at their house for his birthday party. While talking to him and his sister, the conversation went like this:

5-year-old: "Are you going to my house this weekend for my sister's birthday?" 
Me: "I didn't know it's your sister's birthday this week. What day is it?" 
5-year-old: "It's on Thursday." 
Me, asking his 2-year-old sister: "Is your birthday on Thursday?" 
2-year-old: "Yes!"

And that was that. I kept my weekend open for a birthday party invite and started thinking about what gift I was going to get. Later that night, I had a conversation with my wife that went like this:

Me: "Did you know it's <2-year-old's name>'s birthday this week?" 
My wife: "I don't think that's right. Her birthday is in May." 
Me: "Nope, I heard today it's this week!" 
My wife: "Okay, if you say so."

To my surprise, a birthday party invitation never came. The following week, I casually brought up the birthday to their mother and learned that there was no birthday, and the 2-year-old's birthday was, in fact, in May. I was shocked.

Looking back, of course, I shouldn't have blindly trusted a 5-year-old and a 2-year-old, even if they were oddly specific about dates. In the past, I've been told that I'm too trusting and that I should approach situations with a more critical eye. That's probably true, but if I did that, I wouldn't have stressed about an imaginary birthday party and have a memory that I will forever laugh at.