history: I was happy to find that at work my coworker prepared a birthday party for me. I was happy to find that at work my coworker prepared a birthday party for me. I was not expecting it. Wow. I bet that was a nice surprise. Did you get a lot of presents? 
current: Yes. The most that we could garther together.
next: Sounds great. You are lucky to have such thoughtful coworkers. 