When do national party conventions meet?
every two years
every year
in congressional election years
in presidential election years

Explanation:

A United States presidential nominating convention is a political convention held every four years in the United States by most of the political parties who will be fielding nominees in the upcoming U.S. presidential election. I hope that helps you.

On the same day in every state  - Gradpoint

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.

no one really purchased it themselves, it was all america, they had debates etc.