Hello. I had the same problem for a few months. I never really tried looking for answers as it didn’t bother me too much. However, upon reading this, I looked at the post_date, post_date_gmt, post_modified, post_modified_gmt and fixed some rather odd dates that occurred when I ported over Blogger posts.
To be honest, I’m not really sure what did the trick but some posts that read 1999 had 1969 instead. When those were fixed, the 0 disappeared.
Thanks for the lead everyone!