https://www.cnet.com/news/solo-a-star-wars-story-where-are-we-on-the-timeline/

You might, however, leave Solo wondering where the film puts us along the timeline of the galactic saga and what else is happening in the Star Wars universe while Solo kicks off his smuggling adventures. 

The first important timepiece we have from Solo's trailer is that Chewbacca is 190 years old and, according to Wookiepedia, was born in Kashyyyk during the year 200 BBY (before the Battle of Yavin that takes place at the end of A New Hope). Han Solo was born approximately in 29 BBY on the planet Corelia, during the beginning of the fall of the Galactic Republic.