Hard Lessons

So, with Christopher in kindergarten he has the joy of getting invited to all his friends birthday parties. I remember being excited when I got invited to birthday parties when I was little. But it hadn't dawned on me until he got his first invite that people would have these parties on Sunday. Of course, I know Sunday is just a part of the weekend to lots of people, but that didn't really effect Christopher until now. Today he got his second invitation to a party on a Sunday. The first one I didn't really tell him about because I didn't want him to be too dissappointed, but I showed him this second one and he was so excited. So I told him it was on a Sunday and asked him if he thought it was better to go to a party on Sunday or go to church. He's such a good kid he said we should go to church.....but he said it through tears. He really wants to go to the party, but knows that he should go to church. We talked about how there are lots of kids in his class and someone is bound to have a party on a Saturday (I hope) and he can go to one of those parties. I felt so bad because he was so sad about it. I'm not sure what I would have done if he chose the party when I gave him the choice. :) Plus, both parties so far have been at the martial arts center...don't ask me why...maybe all these kids are in karate together??? Any advice on how to handle these types of parenting situations....I hope I didn't guilt him into choosing church.