No hostess likes an early guest. No matter when you start getting ready, you work up until time for guests to arrive.
If you show up early to one of my get togethers I will put you to work.
I am rather infamous for being early. One time there was a choir rehearsal that started at 7. The woman in charge is a dear friend & actually got worried when I wasn’t there by 6:55! She was relieved when I showed up 2 minutes later.
I would rather have someone be 10 minutes late than 10 minutes early. It’s very unnerving.