Wow! I was told if I wanted to buy the full underground tour they would go fast and I was logged on and ready! I couldn't even get 2 tour tickets at the same time for my husband and I🙁 My question is our tickets are for May 2nd can we use the tickets to get into the Foum on May 1st?
Yes, if they're open. Check to see if the the Forum is open on "May Day"
We were in Naples last May Day and some of the sites were closed for the public holiday.
The Forum/Palatine access can be:
1) the day of the colosseum access
2) the day before
3) the day after
i.e. spread over two consecutive days.