Since you are looking for information on recent models, they would have been made in China. I'm sure you will find a date on at least one of the components, probably the cranks. The other place to look is BikePedia. Open up the site, pick "bicycles" then start with a year and pick Schwinn for all the models for that year.
You can look up the Schwinn model name for the years around the time you think it was made and compare the component list and frame color with what is listed. They often change colors with subsequent years.