HOW MANY PEOPLE REMEMBER THEIR BROTHERS AND SISTERS B-DAY?

I only have one sister so it's easy to remember

I actually remember all my siblings birthdays. We were 3 years and 9 days apart, 6 years and 1 week apart and my younger sister is 1 year and 20 days apart. I am not close to my brother but I remember his birthday because of the way it happened above. I am the only Gemini and I am on the cusp of Cancer. My siblings are all Cancers. I was born at 6:29pm on June 20th. It is also the last day of Spring. No wonder I am so confusing and I multi-task like nobodies business. There I go again on a tangent... Hope I answered your question?