domian expire date

I have found an expired domain that is 25 years old. I checked it on SEMrush and there is no valuable information. I also checked the historical content of the website on Wayback Machine, and everything appears to be normal. I am hesitating whether to purchase this domain for a blog website...

Hi there are a domain will expire in 16-05-2012 ( expire date from whois) and i wanted to get it so if i made a backorder, will i get it in 16-05 or i have to wait around 30 days until it's totally available ?