From Eco - English Wiki
A player creating a Timetable with their most common play hours.

A Timetable is a schedule that can be created by both server owners and players to share their preferred Eco play times.

Once players create a Timetable, they will get a higher match score with servers in the Server Browser that share a similar Timetable. Server owners that create a Timetable for their server will also rank more highly in the browser.