The time "1:45" refers to one hour and forty-five minutes past midnight or noon, depending on the context. In a 12-hour clock format, it can be represented as either 1:45 AM or 1:45 PM. This time indicates that it is three-quarters of an hour until the next hour, which would be 2:00. In terms of daily activities, 1:45 might be a common time for lunch in some cultures or a time for afternoon meetings in a work setting. It is also a time when many people might take a break or engage in leisure activities, depending on their schedules.