catluvr,

One big, warm, tight, hug, handshake and howdy, moose-size official type welcome to the site.

I am so sorry for your losses. And I'm very proud of you for hanging in there.
I hope you are seeking help for the pain from all this with a good doc/meds/therapist. As far as your question goes, I think you may be blocking the information on the dates intentionally or even subconciously. (I have done the same thing with traumatic events in my life).

I know keeping a daily journal/diary helps in so many ways. Not just with recovered memories but 'sorting it all out'. Please keep posting and please keep in mind that;

You are not alone
You are one of us.
And we are here to help.