Too early to tell?!

So we found out Sunday I’m pregnant. I’m 4 1/2 weeks. My husband and I have been trying so it’s exciting! Even more exciting we found out before Christmas!! My parents have been asking for another grandchild so they also would be excited for us! I made them a onesie as a Christmas present with the announcement for them. But Is it too early to tell them? Would you wait? I don’t want to wait cause Christmas would be so awesome to tell them! But I don’t want it to be silly for us to tell them so soon. (Everyone else we will wait till 12 weeks)