This document provides an overview of time zones and times of day. It includes a conversation about what time it is in different locations, grammar and vocabulary exercises about telling time, and sample dialogs asking and answering questions about what activities people are doing at various times. The document covers topics such as time zones, telling time in hours and fractions of hours, and using A.M. and P.M. to specify whether a time is in the morning, afternoon or evening. It aims to teach English language learners to ask and answer questions about what time it is in different places, and what activities people are doing at different times of day.