Best time in the year to start cold emailing for research opportunities?
I'm a sophmore in a 5 year program and didn't get any research freshman year, because I never tried, but I need to now. I sent some emails out about a month ago but all of the professors said things along the line of being deep in the summer research process and they weren't taking stuents. Now class start is a week out I'm wondering if now is a good time to start sending emails if professors schedule is pretty empty, or should I wait like a month until they get in the swing of their classes and then send out my emails?