Haven't celebrated our 4 year anniversary

My husband and I have been married for 4 years, we have never had a chance to celebrate. The first year he was in bootcamp, 2 he was in another state, 3rd he was deployed, and now our 4th we couldn't find a babysitter (also we got married on his sister birthday by accident so that's another dilemma)

I was trying to not be sad about it but it's so unbelievable that we cant ever celebrated it on the actual date.