Individuals who remember precise dates can easily be a few days (or more) off. It’s been only a few months since my mother passed away, and a few days ago I thought that 24 May (the day this post originally appeared) was the two-month anniversary of her death.
I was three days off. If, after two months my memory of the date is a little fuzzy, imagine how off it could be if it were years later.
Don’t be surprised if dates of events given well after the fact are a little inconsistent. It’s normal.