I have time-enabled my map layers when publishing from arcmap for two reasons: 1. to be able to set the timezone of my data and 2. to be able to use the time-slider widget. The data represent inspection dates. However, the field starts out null and doesn't get filled in until the inspection happens. But I want to be able to see those features on the map before the inspection occurs as well as after.
I want the default behavior of the web map to be to see all of the data. Only occasionally would they use the time slider widget to focus on a small subset of data.